Index: Ringtoets/Integration/src/Ringtoets.Integration.IO/Assembly/ExportableAssessmentSection.cs
===================================================================
diff -u -r39fbcdb4cfd610d8c8dccbe1793d8f17fce156c4 -r73c63e47823a66cef6285ab755890e05850d7b09
--- Ringtoets/Integration/src/Ringtoets.Integration.IO/Assembly/ExportableAssessmentSection.cs	(.../ExportableAssessmentSection.cs)	(revision 39fbcdb4cfd610d8c8dccbe1793d8f17fce156c4)
+++ Ringtoets/Integration/src/Ringtoets.Integration.IO/Assembly/ExportableAssessmentSection.cs	(.../ExportableAssessmentSection.cs)	(revision 73c63e47823a66cef6285ab755890e05850d7b09)
@@ -48,8 +48,7 @@
         /// of failure mechanisms belonging to this assessment section.</param>
         /// <param name="combinedSectionAssemblyResults">The combined section assembly results
         /// of this assessment section.</param>
-        /// <exception cref="ArgumentNullException">Thrown when any parameter, except <paramref name="id"/> is <c>null</c>.</exception>
-        /// <exception cref="ArgumentException">Thrown when <paramref name="id"/> is <c>null</c>, empty or consists only of whitespaces.</exception>
+        /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
         public ExportableAssessmentSection(string name,
                                            string id,
                                            IEnumerable<Point2D> geometry,
@@ -65,9 +64,9 @@
                 throw new ArgumentNullException(nameof(name));
             }
 
-            if (string.IsNullOrWhiteSpace(id))
+            if (id == null)
             {
-                throw new ArgumentException($@"'{nameof(id)}' must have a value.", nameof(id));
+                throw new ArgumentNullException(nameof(id));
             }
 
             if (geometry == null)
Index: Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Assembly/ExportableAssessmentSectionTest.cs
===================================================================
diff -u -r39fbcdb4cfd610d8c8dccbe1793d8f17fce156c4 -r73c63e47823a66cef6285ab755890e05850d7b09
--- Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Assembly/ExportableAssessmentSectionTest.cs	(.../ExportableAssessmentSectionTest.cs)	(revision 39fbcdb4cfd610d8c8dccbe1793d8f17fce156c4)
+++ Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Assembly/ExportableAssessmentSectionTest.cs	(.../ExportableAssessmentSectionTest.cs)	(revision 73c63e47823a66cef6285ab755890e05850d7b09)
@@ -23,7 +23,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using Core.Common.Base.Geometry;
-using Core.Common.TestUtil;
 using NUnit.Framework;
 using Ringtoets.Integration.IO.Assembly;
 using Ringtoets.Integration.IO.TestUtil;
@@ -45,7 +44,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(null,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       geometry,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -60,10 +59,7 @@
         }
 
         [Test]
-        [TestCase(null)]
-        [TestCase("")]
-        [TestCase("   ")]
-        public void Constructor_InvalidId_ThrowsArgumentException(string invalidId)
+        public void Constructor_InvalidId_ThrowsArgumentException()
         {
             // Setup
             IEnumerable<Point2D> geometry = Enumerable.Empty<Point2D>();
@@ -74,7 +70,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      invalidId,
+                                                                      null,
                                                                       geometry,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -84,8 +80,8 @@
                                                                       CreateCombinedSectionAssemblyCollection());
 
             // Assert
-            const string expectedMessage = "'id' must have a value.";
-            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<ArgumentException>(call, expectedMessage);
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("id", exception.ParamName);
         }
 
         [Test]
@@ -99,7 +95,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       null,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -125,7 +121,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       geometry,
                                                                       null,
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -150,7 +146,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       geometry,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       null,
@@ -176,7 +172,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       geometry,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -200,7 +196,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       geometry,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -223,7 +219,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       geometry,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -249,7 +245,7 @@
 
             // Call
             TestDelegate call = () => new ExportableAssessmentSection(string.Empty,
-                                                                      "id",
+                                                                      string.Empty,
                                                                       geometry,
                                                                       ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult(),
                                                                       ExportableFailureMechanismAssemblyResultTestFactory.CreateResultWithProbability(),
@@ -264,13 +260,12 @@
         }
 
         [Test]
-        [TestCase("")]
-        [TestCase("Valid name")]
-        public void Constructor_WithValidArguments_ExpectedValues(string name)
+        [TestCase("", "")]
+        [TestCase("   ", "   ")]
+        [TestCase("Valid name", "Valid Id")]
+        public void Constructor_WithValidArguments_ExpectedValues(string name, string id)
         {
             // Setup
-            const string id = "Assessment section id";
-
             IEnumerable<Point2D> geometry = Enumerable.Empty<Point2D>();
             ExportableAssessmentSectionAssemblyResult assessmentSectionAssembly = ExportableAssessmentSectionAssemblyResultTestFactory.CreateResult();
             ExportableFailureMechanismAssemblyResultWithProbability failureMechanismAssemblyResultWithProbability =