diff --git a/North_Bridge/North_Bridge_BusinessLogics/Implementations/PostBusinessLogicContract.cs b/North_Bridge/North_Bridge_BusinessLogics/Implementations/PostBusinessLogicContract.cs
index e1264f2..52c098a 100644
--- a/North_Bridge/North_Bridge_BusinessLogics/Implementations/PostBusinessLogicContract.cs
+++ b/North_Bridge/North_Bridge_BusinessLogics/Implementations/PostBusinessLogicContract.cs
@@ -2,45 +2,96 @@
 using Microsoft.Extensions.Logging;
 using North_Bridge_Contract.BusinessLogicsContracts;
 using North_Bridge_Contract.DataModels;
-using North_Bridge_Contract.Enums;
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
 using North_Bridge_Contract.StoragesContracts;
+using System.Text.Json;
 
 namespace North_Bridge_BusinessLogics.Implementations;
 
 internal class PostBusinessLogicContract(IPostStorageContract postStorageContract, ILogger logger) : IPostBusinessLogicContract
 {
     private readonly ILogger _logger = logger;
-    
+
     private readonly IPostStorageContract _postStorageContract = postStorageContract;
-    
+
     public List<PostDataModel> GetAllPosts(bool onlyActive = true)
     {
-        return [];
+        _logger.LogInformation("GetAllPosts params: {onlyActive}", onlyActive);
+        return _postStorageContract.GetList(onlyActive) ?? throw new
+        NullListException();
     }
 
     public List<PostDataModel> GetAllDataOfPost(string postId)
     {
-        return [];
+        _logger.LogInformation("GetAllDataOfPost for {postId}", postId);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _postStorageContract.GetPostWithHistory(postId) ?? throw new NullListException();
     }
 
     public PostDataModel GetPostByData(string data)
     {
-        return new("", "", PostType.None, 0, true, DateTime.UtcNow);
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _postStorageContract.GetElementById(data) ?? throw new
+            ElementNotFoundException(data);
+        }
+        return _postStorageContract.GetElementByName(data) ?? throw new
+        ElementNotFoundException(data);
     }
 
     public void InsertPost(PostDataModel postDataModel)
     {
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.AddElement(postDataModel);
     }
-
     public void UpdatePost(PostDataModel postDataModel)
     {
+        _logger.LogInformation("Update data: {json}",
+        JsonSerializer.Serialize(postDataModel));
+        ArgumentNullException.ThrowIfNull(postDataModel);
+        postDataModel.Validate();
+        _postStorageContract.UpdElement(postDataModel);
     }
-
     public void DeletePost(string id)
     {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.DelElement(id);
     }
-
     public void RestorePost(string id)
     {
+        _logger.LogInformation("Restore by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _postStorageContract.ResElement(id);
     }
 }
\ No newline at end of file
diff --git a/North_Bridge/North_Bridge_BusinessLogics/Implementations/ProductBusinessLogicContract.cs b/North_Bridge/North_Bridge_BusinessLogics/Implementations/ProductBusinessLogicContract.cs
index 7d8860d..09a697a 100644
--- a/North_Bridge/North_Bridge_BusinessLogics/Implementations/ProductBusinessLogicContract.cs
+++ b/North_Bridge/North_Bridge_BusinessLogics/Implementations/ProductBusinessLogicContract.cs
@@ -3,6 +3,9 @@ using North_Bridge_Contract.DataModels;
 using North_Bridge_Contract.Enums;
 using North_Bridge_Contract.StoragesContracts;
 using Microsoft.Extensions.Logging;
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
+using System.Text.Json;
 
 namespace North_Bridge_BusinessLogics.Implementations;
 
@@ -14,28 +17,71 @@ internal class ProductBusinessLogicContract(IProductStorageContract productStora
     
     public List<ProductDataModel> GetAllProducts(bool onlyActive)
     {
-        return [];
+        _logger.LogInformation("GetAllProducts params: {onlyActive}", onlyActive);
+        return _productStorageContract.GetList(onlyActive) ?? throw new
+        NullListException();
     }
-    
+
     public List<ProductHistoryDataModel> GetProductHistoryByProduct(string productId)
     {
-        return [];
+        _logger.LogInformation("GetProductHistoryByProduct for {productId}", productId);
+        if (productId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(productId));
+        }
+        if (!productId.IsGuid())
+        {
+            throw new ValidationException("The value in the field productId is not a unique identifier.");
+        }
+        return _productStorageContract.GetHistoryByProductId(productId) ?? throw new NullListException();
     }
     
     public ProductDataModel GetProductByData(string data)
     {
-        return new("", "", ProductType.None, 0, true);
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _productStorageContract.GetElementById(data) ?? throw
+            new ElementNotFoundException(data);
+        }
+        return _productStorageContract.GetElementByName(data) ?? throw new
+        ElementNotFoundException(data);
     }
-    
+
     public void InsertProduct(ProductDataModel productDataModel)
     {
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(productDataModel));
+        ArgumentNullException.ThrowIfNull(productDataModel);
+        productDataModel.Validate();
+        _productStorageContract.AddElement(productDataModel);
+
     }
-    
+
     public void UpdateProduct(ProductDataModel productDataModel)
     {
+        _logger.LogInformation("Update data: {json}",
+        JsonSerializer.Serialize(productDataModel));
+        ArgumentNullException.ThrowIfNull(productDataModel);
+        productDataModel.Validate();
+        _productStorageContract.UpdElement(productDataModel);
     }
     
     public void DeleteProduct(string id)
     {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _productStorageContract.DelElement(id);
     }
 }
\ No newline at end of file
diff --git a/North_Bridge/North_Bridge_BusinessLogics/Implementations/SalaryBusinessLogicContract.cs b/North_Bridge/North_Bridge_BusinessLogics/Implementations/SalaryBusinessLogicContract.cs
index a03e27b..d257bf6 100644
--- a/North_Bridge/North_Bridge_BusinessLogics/Implementations/SalaryBusinessLogicContract.cs
+++ b/North_Bridge/North_Bridge_BusinessLogics/Implementations/SalaryBusinessLogicContract.cs
@@ -2,6 +2,8 @@
 using North_Bridge_Contract.DataModels;
 using North_Bridge_Contract.StoragesContracts;
 using Microsoft.Extensions.Logging;
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
 
 namespace North_Bridge_BusinessLogics.Implementations;
 
@@ -17,19 +19,53 @@ internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageC
     
     private readonly IWorkerStorageContract _workerStorageContract = workerStorageContract;
     
-    public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate,
-    DateTime toDate)
+    public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate, DateTime toDate)
     {
-        return [];
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _salaryStorageContract.GetList(fromDate, toDate) ?? throw new
+        NullListException();
     }
     
-    public List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime
-    fromDate, DateTime toDate, string workerId)
+    public List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime fromDate, DateTime toDate, string workerId)
     {
-        return [];
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (workerId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(workerId));
+        }
+        if (!workerId.IsGuid())
+        {
+            throw new ValidationException("The value in the field workerId is not a unique identifier.");
+        }
+        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}, { workerId}", fromDate, toDate, workerId);
+        return _salaryStorageContract.GetList(fromDate, toDate, workerId) ??
+        throw new NullListException();
     }
     
     public void CalculateSalaryByMounth(DateTime date)
     {
+        _logger.LogInformation("CalculateSalaryByMounth: {date}", date);
+        var startDate = new DateTime(date.Year, date.Month, 1);
+        var finishDate = new DateTime(date.Year, date.Month,
+        DateTime.DaysInMonth(date.Year, date.Month));
+        var workers = _workerStorageContract.GetList() ?? throw new NullListException();
+        foreach (var worker in workers)
+        {
+            var sales = _saleStorageContract.GetList(startDate,
+            finishDate, workerId: worker.Id)?.Sum(x => x.Sum) ??
+            throw new NullListException();
+            var post = _postStorageContract.GetElementById(worker.PostId)
+            ?? throw new NullListException();
+            var salary = post.Salary + sales * 0.1;
+            _logger.LogDebug("The employee {workerId} was paid a salary of { salary}", worker.Id, salary);
+            _salaryStorageContract.AddElement(new SalaryDataModel(worker.Id, finishDate, salary));
+        }
     }
 }
\ No newline at end of file
diff --git a/North_Bridge/North_Bridge_BusinessLogics/Implementations/SaleBusinessLogicContract.cs b/North_Bridge/North_Bridge_BusinessLogics/Implementations/SaleBusinessLogicContract.cs
index a9a92a8..6e51fd7 100644
--- a/North_Bridge/North_Bridge_BusinessLogics/Implementations/SaleBusinessLogicContract.cs
+++ b/North_Bridge/North_Bridge_BusinessLogics/Implementations/SaleBusinessLogicContract.cs
@@ -1,7 +1,10 @@
 using Microsoft.Extensions.Logging;
 using North_Bridge_Contract.BusinessLogicsContracts;
 using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
 using North_Bridge_Contract.StoragesContracts;
+using System.Text.Json;
 
 namespace North_Bridge_BusinessLogics.Implementations;
 
@@ -11,33 +14,89 @@ internal class SaleBusinessLogicContract(ISaleStorageContract saleStorageContrac
     
     private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
     
-    public List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime
-    toDate)
+    public List<SaleDataModel> GetAllSalesByPeriod(DateTime fromDate, DateTime toDate)
     {
-        return [];
+        _logger.LogInformation("GetAllSales params: {fromDate}, {toDate}", fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _saleStorageContract.GetList(fromDate, toDate) ?? throw new
+        NullListException();
     }
     
     public List<SaleDataModel> GetAllSalesByWorkerByPeriod(string workerId,
     DateTime fromDate, DateTime toDate)
     {
-        return [];
+        _logger.LogInformation("GetAllSales params: {workerId}, {fromDate}, { toDate}", workerId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (workerId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(workerId));
+        }
+        if (!workerId.IsGuid())
+        {
+            throw new ValidationException("The value in the field workerId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, workerId: workerId) ?? throw new NullListException();
     }
     
     public List<SaleDataModel> GetAllSalesByProductByPeriod(string productId, DateTime fromDate, DateTime toDate)
     {
-        return [];
+        _logger.LogInformation("GetAllSales params: {productId}, {fromDate}, { toDate}", productId, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        if (productId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(productId));
+        }
+        if (!productId.IsGuid())
+        {
+            throw new ValidationException("The value in the field productId is not a unique identifier.");
+        }
+        return _saleStorageContract.GetList(fromDate, toDate, productId: productId) ?? throw new NullListException();
     }
 
     public SaleDataModel GetSaleByData(string data)
     {
-        return new("", "", 0, false, []);
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (!data.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        return _saleStorageContract.GetElementById(data) ?? throw new
+        ElementNotFoundException(data);
     }
     
     public void InsertSale(SaleDataModel saleDataModel)
     {
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(saleDataModel));
+        ArgumentNullException.ThrowIfNull(saleDataModel);
+        saleDataModel.Validate();
+        _saleStorageContract.AddElement(saleDataModel);
     }
     
     public void CancelSale(string id)
     {
+        _logger.LogInformation("Cancel by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _saleStorageContract.DelElement(id);
     }
 }
\ No newline at end of file
diff --git a/North_Bridge/North_Bridge_BusinessLogics/Implementations/WorkerBusinessLogicContract.cs b/North_Bridge/North_Bridge_BusinessLogics/Implementations/WorkerBusinessLogicContract.cs
index c961f08..33d9c3c 100644
--- a/North_Bridge/North_Bridge_BusinessLogics/Implementations/WorkerBusinessLogicContract.cs
+++ b/North_Bridge/North_Bridge_BusinessLogics/Implementations/WorkerBusinessLogicContract.cs
@@ -1,7 +1,10 @@
 using Microsoft.Extensions.Logging;
 using North_Bridge_Contract.BusinessLogicsContracts;
 using North_Bridge_Contract.DataModels;
+using North_Bridge_Contract.Exceptions;
+using North_Bridge_Contract.Extentions;
 using North_Bridge_Contract.StoragesContracts;
+using System.Text.Json;
 
 namespace North_Bridge_BusinessLogics.Implementations;
 
@@ -13,39 +16,92 @@ internal class WorkerBusinessLogicContract(IWorkerStorageContract workerStorageC
     
     public List<WorkerDataModel> GetAllWorkers(bool onlyActive = true)
     {
-        return [];
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}", onlyActive);
+        return _workerStorageContract.GetList(onlyActive) ?? throw new NullListException();
     }
-    
+
     public List<WorkerDataModel> GetAllWorkersByPost(string postId, bool
     onlyActive = true)
     {
-        return [];
+        _logger.LogInformation("GetAllWorkers params: {postId}, { onlyActive},", postId, onlyActive);
+        if (postId.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(postId));
+        }
+        if (!postId.IsGuid())
+        {
+            throw new ValidationException("The value in the field postId is not a unique identifier.");
+        }
+        return _workerStorageContract.GetList(onlyActive, postId) ?? throw new NullListException();
     }
-    
+
     public List<WorkerDataModel> GetAllWorkersByBirthDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
     {
-        return [];
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}, { fromDate}, { toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _workerStorageContract.GetList(onlyActive, fromBirthDate:
+        fromDate, toBirthDate: toDate) ?? throw new NullListException();
     }
-    
+
     public List<WorkerDataModel> GetAllWorkersByEmploymentDate(DateTime fromDate, DateTime toDate, bool onlyActive = true)
     {
-        return [];
+        _logger.LogInformation("GetAllWorkers params: {onlyActive}, { fromDate}, { toDate}", onlyActive, fromDate, toDate);
+        if (fromDate.IsDateNotOlder(toDate))
+        {
+            throw new IncorrectDatesException(fromDate, toDate);
+        }
+        return _workerStorageContract.GetList(onlyActive, fromEmploymentDate:
+        fromDate, toEmploymentDate: toDate) ?? throw new NullListException();
     }
-    
+
     public WorkerDataModel GetWorkerByData(string data)
     {
-        return new("", "", "", "", DateTime.Now, DateTime.Now, true);
+        _logger.LogInformation("Get element by data: {data}", data);
+        if (data.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+        if (data.IsGuid())
+        {
+            return _workerStorageContract.GetElementById(data) ?? throw
+            new ElementNotFoundException(data);
+        }
+        return _workerStorageContract.GetElementByFIO(data) ?? throw new
+        ElementNotFoundException(data);
     }
     
     public void InsertWorker(WorkerDataModel workerDataModel)
     {
+        _logger.LogInformation("New data: {json}",
+        JsonSerializer.Serialize(workerDataModel));
+        ArgumentNullException.ThrowIfNull(workerDataModel);
+        workerDataModel.Validate();
+        _workerStorageContract.AddElement(workerDataModel);
     }
     
     public void UpdateWorker(WorkerDataModel workerDataModel)
     {
+        _logger.LogInformation("Update data: {json}",
+        JsonSerializer.Serialize(workerDataModel));
+        ArgumentNullException.ThrowIfNull(workerDataModel);
+        workerDataModel.Validate();
+        _workerStorageContract.UpdElement(workerDataModel);
     }
     
     public void DeleteWorker(string id)
     {
+        _logger.LogInformation("Delete by id: {id}", id);
+        if (id.IsEmpty())
+        {
+            throw new ArgumentNullException(nameof(id));
+        }
+        if (!id.IsGuid())
+        {
+            throw new ValidationException("Id is not a unique identifier");
+        }
+        _workerStorageContract.DelElement(id);
     }
 }
\ No newline at end of file
diff --git a/North_Bridge/North_Bridge_Contract/DataModels/WorkerDataModel.cs b/North_Bridge/North_Bridge_Contract/DataModels/WorkerDataModel.cs
index b09cd89..cf18981 100644
--- a/North_Bridge/North_Bridge_Contract/DataModels/WorkerDataModel.cs
+++ b/North_Bridge/North_Bridge_Contract/DataModels/WorkerDataModel.cs
@@ -20,7 +20,7 @@ public class WorkerDataModel : IValidation
 
     public bool IsDeleted { get; private set; }
 
-    public WorkerDataModel(string id, string email, string fio, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted)
+    public WorkerDataModel(string id, string fio, string email, string postId, DateTime birthDate, DateTime employmentDate, bool isDeleted)
     {
         Id = id;
         FIO = fio;
@@ -42,22 +42,25 @@ public class WorkerDataModel : IValidation
         if (FIO.IsEmpty())
             throw new ValidationException("Field FIO is empty");
 
+        if (Email.IsEmpty())
+            throw new ValidationException("Field Email is empty");
+
+        if (!Regex.IsMatch(Email, @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$"))
+            throw new ValidationException("Field Email is not a valid email address");
+
         if (PostId.IsEmpty())
             throw new ValidationException("Field PostId is empty");
 
         if (!PostId.IsGuid())
             throw new ValidationException("The value in the field PostId is not a unique identifier");
 
-        if (BirthDate.Date > DateTime.Now.AddYears(-16).Date)
-            throw new ValidationException($"Minors cannot be hired (BirthDate = { BirthDate.ToShortDateString() })");
+        if (BirthDate.Date > DateTime.Now.AddYears(-18).Date)
+            throw new ValidationException($"Only adults can be hired (BirthDate = {BirthDate.ToShortDateString()})");
 
         if (EmploymentDate.Date < BirthDate.Date)
             throw new ValidationException("The date of employment cannot be less than the date of birth");
 
-        if ((EmploymentDate - BirthDate).TotalDays / 365 < 16) // EmploymentDate.Year - BirthDate.Year
-            throw new ValidationException($"Minors cannot be hired (EmploymentDate - { EmploymentDate.ToShortDateString() }, BirthDate - { BirthDate.ToShortDateString()})");
-
-        if (!Regex.IsMatch(Email, @"^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$")) // example@example.com
-            throw new ValidationException("Field Email is not a email");
+        if ((EmploymentDate - BirthDate).TotalDays / 365 < 18)
+            throw new ValidationException($"Only adults can be hired (EmploymentDate - {EmploymentDate.ToShortDateString()}, BirthDate - {BirthDate.ToShortDateString()})");
     }
 }
\ No newline at end of file
diff --git a/North_Bridge/North_Bridge_Tests/BusinessLogicsContractsTests/WorkerBusinessLogicContractTests.cs b/North_Bridge/North_Bridge_Tests/BusinessLogicsContractsTests/WorkerBusinessLogicContractTests.cs
index f6b9cd0..4af01f8 100644
--- a/North_Bridge/North_Bridge_Tests/BusinessLogicsContractsTests/WorkerBusinessLogicContractTests.cs
+++ b/North_Bridge/North_Bridge_Tests/BusinessLogicsContractsTests/WorkerBusinessLogicContractTests.cs
@@ -583,7 +583,7 @@ internal class WorkerBusinessLogicContractTests
         //Arrange
         var flag = false;
         var record = new WorkerDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com",
-        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18).AddDays(-1), DateTime.Now,
         false);
         _workerStorageContract.Setup(x =>
         x.AddElement(It.IsAny<WorkerDataModel>()))
@@ -612,7 +612,7 @@ internal class WorkerBusinessLogicContractTests
         //Act&Assert
         Assert.That(() =>
         _workerBusinessLogicContract.InsertWorker(new(Guid.NewGuid().ToString(), "fio", "example@example.com",
-        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18).AddDays(-1), DateTime.Now,
         false)), Throws.TypeOf<ElementExistsException>());
         _workerStorageContract.Verify(x =>
         x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
@@ -649,7 +649,7 @@ internal class WorkerBusinessLogicContractTests
         //Act&Assert
         Assert.That(() =>
         _workerBusinessLogicContract.InsertWorker(new(Guid.NewGuid().ToString(), "fio", "example@example.com",
-        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18).AddDays(-1), DateTime.Now,
         false)), Throws.TypeOf<StorageException>());
         _workerStorageContract.Verify(x =>
         x.AddElement(It.IsAny<WorkerDataModel>()), Times.Once);
@@ -661,7 +661,7 @@ internal class WorkerBusinessLogicContractTests
         //Arrange
         var flag = false;
         var record = new WorkerDataModel(Guid.NewGuid().ToString(), "fio", "example@example.com",
-        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18).AddDays(-1), DateTime.Now,
         false);
         _workerStorageContract.Setup(x =>
         x.UpdElement(It.IsAny<WorkerDataModel>()))
@@ -690,7 +690,7 @@ internal class WorkerBusinessLogicContractTests
         //Act&Assert
         Assert.That(() =>
         _workerBusinessLogicContract.UpdateWorker(new(Guid.NewGuid().ToString(), "fio", "example@example.com",
-        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18).AddDays(-1), DateTime.Now,
         false)), Throws.TypeOf<ElementNotFoundException>());
         _workerStorageContract.Verify(x =>
         x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
@@ -727,7 +727,7 @@ internal class WorkerBusinessLogicContractTests
         //Act&Assert
         Assert.That(() =>
         _workerBusinessLogicContract.UpdateWorker(new(Guid.NewGuid().ToString(), "fio", "example@example.com",
-        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-16).AddDays(-1), DateTime.Now,
+        Guid.NewGuid().ToString(), DateTime.Now.AddYears(-18).AddDays(-1), DateTime.Now,
         false)), Throws.TypeOf<StorageException>());
         _workerStorageContract.Verify(x =>
         x.UpdElement(It.IsAny<WorkerDataModel>()), Times.Once);
diff --git a/North_Bridge/North_Bridge_Tests/DataModelsTests/WorkerDataModelTests.cs b/North_Bridge/North_Bridge_Tests/DataModelsTests/WorkerDataModelTests.cs
index 751a89c..0baf001 100644
--- a/North_Bridge/North_Bridge_Tests/DataModelsTests/WorkerDataModelTests.cs
+++ b/North_Bridge/North_Bridge_Tests/DataModelsTests/WorkerDataModelTests.cs
@@ -99,26 +99,26 @@ internal class WorkerDataModelTests
     {
         var workerId = Guid.NewGuid().ToString();
         var fio = "fio";
-        var email = "example@example.com";
+        var Email = "example@example.com";
         var postId = Guid.NewGuid().ToString();
-        var birthDate = DateTime.Now.AddYears(-16).AddDays(-1);
+        var birthDate = DateTime.Now.AddYears(-18).AddDays(-1);
         var employmentDate = DateTime.Now;
         var isDelete = false;
-        var worker = CreateDataModel(workerId, fio, email, postId, birthDate, employmentDate, isDelete);
+        var worker = CreateDataModel(workerId, fio, Email, postId, birthDate, employmentDate, isDelete);
         Assert.That(() => worker.Validate(), Throws.Nothing);
         Assert.Multiple(() =>
         {
             Assert.That(worker.Id, Is.EqualTo(workerId));
             Assert.That(worker.FIO, Is.EqualTo(fio));
-            Assert.That(worker.Email, Is.EqualTo(email));
+            Assert.That(worker.Email, Is.EqualTo(Email));
             Assert.That(worker.PostId, Is.EqualTo(postId));
             Assert.That(worker.BirthDate, Is.EqualTo(birthDate));
-            Assert.That(worker.EmploymentDate,Is.EqualTo(employmentDate));
+            Assert.That(worker.EmploymentDate, Is.EqualTo(employmentDate));
             Assert.That(worker.IsDeleted, Is.EqualTo(isDelete));
         });
     }
 
-    private static WorkerDataModel CreateDataModel(string? id, string? fio, string email,
+    private static WorkerDataModel CreateDataModel(string? id, string? fio, string? email,
     string? postId, DateTime birthDate, DateTime employmentDate, bool isDeleted) =>
     new(id, fio, email, postId, birthDate, employmentDate, isDeleted);
 }
\ No newline at end of file