diff --git a/README.md b/README.md
index f9a60d1b..4235875f 100644
--- a/README.md
+++ b/README.md
@@ -345,10 +345,6 @@ The following tests are not yet implemented and therefore missing:
 - Recommeded Test 6.2.24
 - Recommeded Test 6.2.25
 - Recommeded Test 6.2.26
-- Recommeded Test 6.2.27
-- Recommeded Test 6.2.28
-- Recommeded Test 6.2.29
-- Recommeded Test 6.2.30
 - Recommeded Test 6.2.31
 - Recommeded Test 6.2.32
 - Recommeded Test 6.2.33
@@ -463,6 +459,10 @@ export const recommendedTest_6_2_18: DocumentTest
 export const recommendedTest_6_2_19: DocumentTest
 export const recommendedTest_6_2_20: DocumentTest
 export const recommendedTest_6_2_22: DocumentTest
+export const recommendedTest_6_2_27: DocumentTest
+export const recommendedTest_6_2_28: DocumentTest
+export const recommendedTest_6_2_29: DocumentTest
+export const recommendedTest_6_2_30: DocumentTest
 ```
 
 [(back to top)](#bsi-csaf-validator-lib)
diff --git a/csaf_2_1/recommendedTests.js b/csaf_2_1/recommendedTests.js
index 641832bb..403a50c8 100644
--- a/csaf_2_1/recommendedTests.js
+++ b/csaf_2_1/recommendedTests.js
@@ -30,4 +30,5 @@ export { recommendedTest_6_2_22 } from './recommendedTests/recommendedTest_6_2_2
 export { recommendedTest_6_2_27 } from './recommendedTests/recommendedTest_6_2_27.js'
 export { recommendedTest_6_2_28 } from './recommendedTests/recommendedTest_6_2_28.js'
 export { recommendedTest_6_2_29 } from './recommendedTests/recommendedTest_6_2_29.js'
+export { recommendedTest_6_2_30 } from './recommendedTests/recommendedTest_6_2_30.js'
 export { recommendedTest_6_2_38 } from './recommendedTests/recommendedTest_6_2_38.js'
diff --git a/csaf_2_1/recommendedTests/recommendedTest_6_2_30.js b/csaf_2_1/recommendedTests/recommendedTest_6_2_30.js
new file mode 100644
index 00000000..98fe9370
--- /dev/null
+++ b/csaf_2_1/recommendedTests/recommendedTest_6_2_30.js
@@ -0,0 +1,64 @@
+import Ajv from 'ajv/dist/jtd.js'
+
+const ajv = new Ajv()
+
+/*
+  This is the jtd schema that needs to match the input document so that the
+  test is activated. If this schema doesn't match it normally means that the input
+  document does not validate against the csaf json schema or optional fields that
+  the test checks are not present.
+ */
+const inputSchema = /** @type {const} */ ({
+  additionalProperties: true,
+  properties: {
+    document: {
+      additionalProperties: true,
+      properties: {
+        distribution: {
+          additionalProperties: true,
+          properties: {
+            sharing_group: {
+              additionalProperties: true,
+              properties: {},
+            },
+            tlp: {
+              additionalProperties: true,
+              properties: {
+                label: { type: 'string' },
+              },
+            },
+          },
+        },
+      },
+    },
+  },
+})
+const validateInput = ajv.compile(inputSchema)
+
+/**
+ * This implements the optional test 6.2.30 of the CSAF 2.1 standard.
+ * @param {any} doc
+ */
+export function recommendedTest_6_2_30(doc) {
+  const ctx = {
+    warnings:
+      /** @type {Array<{ instancePath: string; message: string }>} */ ([]),
+  }
+
+  if (!validateInput(doc)) {
+    return ctx
+  }
+
+  // Check for sharing_group usage when TLP is CLEAR
+  if (
+    doc.document.distribution.tlp.label === 'CLEAR' &&
+    doc.document.distribution.sharing_group
+  ) {
+    ctx.warnings.push({
+      instancePath: '/document/distribution/sharing_group',
+      message: `TLP:CLEAR documents should not use a 'sharing_group'`,
+    })
+  }
+
+  return ctx
+}
diff --git a/tests/csaf_2_1/oasis.js b/tests/csaf_2_1/oasis.js
index ed81ff09..fb5fcba8 100644
--- a/tests/csaf_2_1/oasis.js
+++ b/tests/csaf_2_1/oasis.js
@@ -49,7 +49,6 @@ const excluded = [
   '6.2.24',
   '6.2.25',
   '6.2.26',
-  '6.2.30',
   '6.2.31',
   '6.2.32',
   '6.2.33',
diff --git a/tests/csaf_2_1/recommendedTest_6_2_30.js b/tests/csaf_2_1/recommendedTest_6_2_30.js
new file mode 100644
index 00000000..4eb87212
--- /dev/null
+++ b/tests/csaf_2_1/recommendedTest_6_2_30.js
@@ -0,0 +1,11 @@
+import assert from 'node:assert'
+import { recommendedTest_6_2_30 } from '../../csaf_2_1/recommendedTests.js'
+
+describe('recommendedTest_6_2_30', function () {
+  it('only runs on relevant documents', function () {
+    assert.equal(
+      recommendedTest_6_2_30({ vulnerabilities: 'mydoc' }).warnings.length,
+      0
+    )
+  })
+})