diff --git a/csaf_2.1/prose/edit/src/tests-01-mndtr-45-inconsistent-disclosure-date.md b/csaf_2.1/prose/edit/src/tests-01-mndtr-45-inconsistent-disclosure-date.md
new file mode 100644
index 00000000..de75ffbc
--- /dev/null
+++ b/csaf_2.1/prose/edit/src/tests-01-mndtr-45-inconsistent-disclosure-date.md
@@ -0,0 +1,46 @@
+### Inconsistent Disclosure Date
+
+For each vulnerability, it MUST be tested that the `disclosure_date` is not newer than the `date` of the newest item of the `revision_history`
+if the document is labeled `TLP:CLEAR` and the document status is `final` or `interim`.
+As the timestamps might use different timezones, the sorting MUST take timezones into account.
+
+The relevant path for this test is:
+
+```
+    /vulnerabilities[]/disclosure_date
+```
+
+*Example 1 (which fails the test):*
+
+```
+  "document": {
+    // ...
+    "distribution": {
+      "tlp": {
+        "label": "CLEAR"
+      }
+    },
+    // ...
+    "tracking": {
+      "current_release_date": "2024-01-24T10:00:00.000Z",
+      // ...
+      "initial_release_date": "2024-01-24T10:00:00.000Z",
+      "revision_history": [
+        {
+          "date": "2024-01-24T10:00:00.000Z",
+          "number": "1",
+          "summary": "Initial version."
+        }
+      ],
+      "status": "final",
+      "version": "1"
+    }
+  },
+  "vulnerabilities": [
+    {
+      "disclosure_date": "2024-02-24T10:00:00.000Z"
+    }
+  ]
+```
+
+> The document is labeled `TLP:CLEAR` and in status `final` but the `disclosure_date` is newer than the date of newest item in the `revision_history`.
diff --git a/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-01.json b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-01.json
new file mode 100644
index 00000000..6f6e6954
--- /dev/null
+++ b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-01.json
@@ -0,0 +1,37 @@
+{
+  "$schema": "https://docs.oasis-open.org/csaf/csaf/v2.1/csaf_json_schema.json",
+  "document": {
+    "category": "csaf_base",
+    "csaf_version": "2.1",
+    "distribution": {
+      "tlp": {
+        "label": "CLEAR"
+      }
+    },
+    "publisher": {
+      "category": "other",
+      "name": "OASIS CSAF TC",
+      "namespace": "https://csaf.io"
+    },
+    "title": "Mandatory test: Inconsistent Disclosure Date (failing example 1)",
+    "tracking": {
+      "current_release_date": "2024-01-24T10:00:00.000Z",
+      "id": "OASIS_CSAF_TC-CSAF_2.1-2024-6-1-45-01",
+      "initial_release_date": "2024-01-24T10:00:00.000Z",
+      "revision_history": [
+        {
+          "date": "2024-01-24T10:00:00.000Z",
+          "number": "1",
+          "summary": "Initial version."
+        }
+      ],
+      "status": "final",
+      "version": "1"
+    }
+  },
+  "vulnerabilities": [
+    {
+      "disclosure_date": "2024-02-24T10:00:00.000Z"
+    }
+  ]
+}
diff --git a/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-02.json b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-02.json
new file mode 100644
index 00000000..0b7df51c
--- /dev/null
+++ b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-02.json
@@ -0,0 +1,42 @@
+{
+  "$schema": "https://docs.oasis-open.org/csaf/csaf/v2.1/csaf_json_schema.json",
+  "document": {
+    "category": "csaf_base",
+    "csaf_version": "2.1",
+    "distribution": {
+      "tlp": {
+        "label": "CLEAR"
+      }
+    },
+    "publisher": {
+      "category": "other",
+      "name": "OASIS CSAF TC",
+      "namespace": "https://csaf.io"
+    },
+    "title": "Mandatory test: Inconsistent Disclosure Date (failing example 2)",
+    "tracking": {
+      "current_release_date": "2024-02-29T10:00:00.000Z",
+      "id": "OASIS_CSAF_TC-CSAF_2.1-2024-6-1-45-02",
+      "initial_release_date": "2024-01-24T10:00:00.000Z",
+      "revision_history": [
+        {
+          "date": "2024-01-24T10:00:00.000Z",
+          "number": "1",
+          "summary": "Initial version."
+        },
+        {
+          "date": "2024-02-29T10:00:00.000Z",
+          "number": "2",
+          "summary": "Second version."
+        }
+      ],
+      "status": "final",
+      "version": "2"
+    }
+  },
+  "vulnerabilities": [
+    {
+      "disclosure_date": "2025-02-26T10:00:00.000Z"
+    }
+  ]
+}
diff --git a/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-11.json b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-11.json
new file mode 100644
index 00000000..b66dd483
--- /dev/null
+++ b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-11.json
@@ -0,0 +1,37 @@
+{
+  "$schema": "https://docs.oasis-open.org/csaf/csaf/v2.1/csaf_json_schema.json",
+  "document": {
+    "category": "csaf_base",
+    "csaf_version": "2.1",
+    "distribution": {
+      "tlp": {
+        "label": "CLEAR"
+      }
+    },
+    "publisher": {
+      "category": "other",
+      "name": "OASIS CSAF TC",
+      "namespace": "https://csaf.io"
+    },
+    "title": "Mandatory test: Inconsistent Disclosure Date (valid example 1)",
+    "tracking": {
+      "current_release_date": "2024-01-24T10:00:00.000Z",
+      "id": "OASIS_CSAF_TC-CSAF_2.1-2024-6-1-45-11",
+      "initial_release_date": "2024-01-24T10:00:00.000Z",
+      "revision_history": [
+        {
+          "date": "2024-01-24T10:00:00.000Z",
+          "number": "1",
+          "summary": "Initial version."
+        }
+      ],
+      "status": "final",
+      "version": "1"
+    }
+  },
+  "vulnerabilities": [
+    {
+      "disclosure_date": "2024-01-24T10:00:00.000Z"
+    }
+  ]
+}
diff --git a/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-12.json b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-12.json
new file mode 100644
index 00000000..1c0abf5a
--- /dev/null
+++ b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-12.json
@@ -0,0 +1,42 @@
+{
+  "$schema": "https://docs.oasis-open.org/csaf/csaf/v2.1/csaf_json_schema.json",
+  "document": {
+    "category": "csaf_base",
+    "csaf_version": "2.1",
+    "distribution": {
+      "tlp": {
+        "label": "CLEAR"
+      }
+    },
+    "publisher": {
+      "category": "other",
+      "name": "OASIS CSAF TC",
+      "namespace": "https://csaf.io"
+    },
+    "title": "Mandatory test: Inconsistent Disclosure Date (valid example 2)",
+    "tracking": {
+      "current_release_date": "2024-02-29T10:00:00.000Z",
+      "id": "OASIS_CSAF_TC-CSAF_2.1-2024-6-1-45-12",
+      "initial_release_date": "2024-01-24T10:00:00.000Z",
+      "revision_history": [
+        {
+          "date": "2024-01-24T10:00:00.000Z",
+          "number": "1",
+          "summary": "Initial version."
+        },
+        {
+          "date": "2024-02-29T10:00:00.000Z",
+          "number": "2",
+          "summary": "Second version."
+        }
+      ],
+      "status": "final",
+      "version": "2"
+    }
+  },
+  "vulnerabilities": [
+    {
+      "disclosure_date": "2024-02-26T10:00:00.000Z"
+    }
+  ]
+}
diff --git a/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-13.json b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-13.json
new file mode 100644
index 00000000..7c76f9ab
--- /dev/null
+++ b/csaf_2.1/test/validator/data/mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-13.json
@@ -0,0 +1,42 @@
+{
+  "$schema": "https://docs.oasis-open.org/csaf/csaf/v2.1/csaf_json_schema.json",
+  "document": {
+    "category": "csaf_base",
+    "csaf_version": "2.1",
+    "distribution": {
+      "tlp": {
+        "label": "AMBER+STRICT"
+      }
+    },
+    "publisher": {
+      "category": "other",
+      "name": "OASIS CSAF TC",
+      "namespace": "https://csaf.io"
+    },
+    "title": "Mandatory test: Inconsistent Disclosure Date (valid example 3)",
+    "tracking": {
+      "current_release_date": "2024-02-29T10:00:00.000Z",
+      "id": "OASIS_CSAF_TC-CSAF_2.1-2024-6-1-45-13",
+      "initial_release_date": "2024-01-24T10:00:00.000Z",
+      "revision_history": [
+        {
+          "date": "2024-01-24T10:00:00.000Z",
+          "number": "1",
+          "summary": "Initial version."
+        },
+        {
+          "date": "2024-02-29T10:00:00.000Z",
+          "number": "2",
+          "summary": "Second version."
+        }
+      ],
+      "status": "final",
+      "version": "2"
+    }
+  },
+  "vulnerabilities": [
+    {
+      "disclosure_date": "2025-02-26T10:00:00.000Z"
+    }
+  ]
+}
diff --git a/csaf_2.1/test/validator/data/testcases.json b/csaf_2.1/test/validator/data/testcases.json
index abcae151..c42533fa 100644
--- a/csaf_2.1/test/validator/data/testcases.json
+++ b/csaf_2.1/test/validator/data/testcases.json
@@ -1342,6 +1342,34 @@
         }
       ]
     },
+    {
+      "id": "6.1.45",
+      "group": "mandatory",
+      "failures": [
+        {
+          "name": "mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-01.json",
+          "valid": false
+        },
+        {
+          "name": "mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-02.json",
+          "valid": false
+        }
+      ],
+      "valid": [
+        {
+          "name": "mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-11.json",
+          "valid": true
+        },
+        {
+          "name": "mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-12.json",
+          "valid": true
+        },
+        {
+          "name": "mandatory/oasis_csaf_tc-csaf_2_1-2024-6-1-45-13.json",
+          "valid": true
+        }
+      ]
+    },
     {
       "id": "6.2.1",
       "group": "optional",
diff --git a/csaf_2.1/test/validator/testcases_json_schema.json b/csaf_2.1/test/validator/testcases_json_schema.json
index 1fd3d681..3d64e3ad 100644
--- a/csaf_2.1/test/validator/testcases_json_schema.json
+++ b/csaf_2.1/test/validator/testcases_json_schema.json
@@ -62,7 +62,7 @@
           "title": "Number of the test",
           "description": "Contains the section number of the test in the specification.",
           "type": "string",
-          "pattern": "^6\\.(([1-3]\\.[1-9])|(1\\.10)|([12]\\.1[1-9])|(3\\.1[0-2])|([12]\\.2[0-6])|(2\\.27)|([12]\\.2[8-9])|(1\\.27\\.([1-9]|10|11))|([12]\\.3[0-2])|(1\\.3[3-9])|(1\\.4[0-4]))$"
+          "pattern": "^6\\.(([1-3]\\.[1-9])|(1\\.10)|([12]\\.1[1-9])|(3\\.1[0-2])|([12]\\.2[0-6])|(2\\.27)|([12]\\.2[8-9])|(1\\.27\\.([1-9]|10|11))|([12]\\.3[0-2])|(1\\.3[3-9])|(1\\.4[0-5]))$"
         },
         "valid": {
           "title": "List of valid examples",