Вытащил солюшен на уровень выше, чтобы прощё было дотнетить

ApplicationLayer/Services/VisaApplications/Requests/Validation/VisaApplicationCreateRequestValidator.cs

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+using ApplicationLayer.InfrastructureServicesInterfaces;
+using ApplicationLayer.Services.Applicants.NeededServices;
+using ApplicationLayer.Services.VisaApplications.Models;
+using Domains;
+using Domains.VisaApplicationDomain;
+using FluentValidation;
+
+namespace ApplicationLayer.Services.VisaApplications.Requests.Validation;
+
+public class VisaApplicationCreateRequestValidator : AbstractValidator<VisaApplicationCreateRequest>
+{
+    public VisaApplicationCreateRequestValidator(
+        IValidator<ReentryPermitModel?> reentryPermitModelValidator,
+        IValidator<PastVisaModel> pastVisaModelValidator,
+        IValidator<PermissionToDestCountryModel?> permissionToDestCountryModelValidator,
+        IValidator<PastVisitModel> pastVisitModelValidator,
+        IApplicantsRepository applicants,
+        IUserIdProvider userIdProvider)
+    {
+        RuleFor(r => r.PermissionToDestCountry)
+            .NotEmpty()
+            .WithMessage("For transit you must provide permission to destination country")
+            .SetValidator(permissionToDestCountryModelValidator)
+            .When(r => r.VisaCategory is VisaCategory.Transit);
+
+        RuleFor(r => r.ReentryPermit)
+            .NotEmpty()
+            .WithMessage("Non-residents must provide re-entry permission")
+            .SetValidator(reentryPermitModelValidator)
+            .WhenAsync(async (_, ct) =>
+                await applicants.IsApplicantNonResidentByUserId(userIdProvider.GetUserId(), ct));
+
+        RuleFor(r => r.DestinationCountry)
+            .NotEmpty()
+            .WithMessage("Destination country can not be empty");
+
+        RuleFor(r => r.VisaCategory)
+            .IsInEnum();
+
+        RuleFor(r => r.RequestedNumberOfEntries)
+            .IsInEnum();
+
+        RuleFor(r => r.ValidDaysRequested)
+            .GreaterThan(0)
+            .WithMessage($"Valid days requested should be positive number and less than {ConfigurationConstraints.MaxValidDays}")
+            .LessThanOrEqualTo(ConfigurationConstraints.MaxValidDays)
+            .WithMessage($"Valid days requested must be less than or equal to {ConfigurationConstraints.MaxValidDays}");
+
+        RuleForEach(r => r.PastVisas)
+            .SetValidator(pastVisaModelValidator);
+
+        RuleForEach(r => r.PastVisits)
+            .SetValidator(pastVisitModelValidator);
+    }
+}

ApplicationLayer/Services/VisaApplications/Requests/VisaApplicationCreateRequest.cs

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+using System.ComponentModel.DataAnnotations;
+using ApplicationLayer.Services.VisaApplications.Models;
+using Domains;
+using Domains.VisaApplicationDomain;
+
+namespace ApplicationLayer.Services.VisaApplications.Requests;
+
+/// Model of visa request from user
+public class VisaApplicationCreateRequest
+{
+    public ReentryPermitModel? ReentryPermit { get; set; }
+
+    [Required]
+    [MaxLength(ConfigurationConstraints.CountryNameLength)]
+    public string DestinationCountry { get; set; } = null!;
+
+    [Required]
+    public VisaCategory VisaCategory { get; set; }
+
+    [Required]
+    public bool IsForGroup { get; set; }
+
+    [Required]
+    public RequestedNumberOfEntries RequestedNumberOfEntries { get; set; }
+
+    [Required]
+    [Range(0, ConfigurationConstraints.MaxValidDays)]
+    public int ValidDaysRequested { get; set; }
+
+    [Required]
+    public PastVisaModel[] PastVisas { get; set; } = null!;
+
+    public PermissionToDestCountryModel? PermissionToDestCountry { get; set; }
+
+    [Required]
+    public PastVisitModel[] PastVisits { get; set; } = null!;
+}