diff --git a/src/InternshipSystem.Core/Entity/Internship/InternshipRegistration.cs b/src/InternshipSystem.Core/Entity/Internship/InternshipRegistration.cs
index b3c40e9..db6b877 100644
--- a/src/InternshipSystem.Core/Entity/Internship/InternshipRegistration.cs
+++ b/src/InternshipSystem.Core/Entity/Internship/InternshipRegistration.cs
@@ -49,9 +49,11 @@ namespace InternshipSystem.Core.Entity.Internship
                     .SetValidator(new Mentor.Validate())
                     .NotNull();
                 RuleFor(x => x.Subjects)
-                    .NotEmpty();
+                    .NotEmpty()
+                    .Must(s => edition.AreSubjectsAvailable(s.Select(su => su.InternshipSubjectId)));
                 RuleFor(x => x.Type)
-                    .NotNull();
+                    .NotNull()
+                    .Must(edition.IsTypeAvailable);
                 RuleFor(x => x.Start)
                     .GreaterThanOrEqualTo(edition.EditionStart)
                     .LessThan(x => x.End)