diff --git a/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.json b/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.json
new file mode 100644
index 00000000..c45f41eb
--- /dev/null
+++ b/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.json
@@ -0,0 +1,52 @@
+{
+  "name": "28e5394c-3122-4f50-a926-c7f168f0ebcc",
+  "type": "Microsoft.Authorization/policyDefinitions",
+  "properties": {
+    "displayName": "Validate date tag on subscription",
+    "description": "Validate a date tag on a subscription, e.g. ExpirationDate, in a YYYY-MM-DD format.",
+    "metadata": {
+      "version": "1.0.0",
+      "category": "Tags"
+    },
+    "mode": "All",
+    "parameters": {
+      "tagExpirationDate": {
+        "type": "String",
+        "metadata": {
+          "displayName": "tagExpirationDate",
+          "description": "Name of the tag containing a date value."
+        }
+      },
+      "effect": {
+        "type": "String",
+        "metadata": {
+          "displayName": "Effect",
+          "description": "Deny, Audit or Disabled the execution of the Policy"
+        },
+        "allowedValues": [
+          "Deny",
+          "Audit",
+          "Disabled"
+        ],
+        "defaultValue": "Audit"
+      }
+    },
+    "policyRule": {
+      "if": {
+        "allOf": [
+          {
+            "field": "type",
+            "equals": "Microsoft.Resources/subscriptions"
+          },
+          {
+            "field": "[concat('tags[',parameters('tagExpirationDate'), ']')]",
+            "notMatch": "####-##-##"
+          }
+        ]
+      },
+      "then": {
+        "effect": "[parameters('effect')]"
+      }
+    }
+  }
+}
diff --git a/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.parameters.json b/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.parameters.json
new file mode 100644
index 00000000..97045966
--- /dev/null
+++ b/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.parameters.json
@@ -0,0 +1,22 @@
+{
+  "tagExpirationDate": {
+    "type": "String",
+    "metadata": {
+      "displayName": "tagExpirationDate",
+      "description": "Name of the tag containing a date value."
+    }
+  },
+  "effect": {
+    "type": "String",
+    "metadata": {
+      "displayName": "Effect",
+      "description": "Deny, Audit or Disabled the execution of the Policy"
+    },
+    "allowedValues": [
+      "Deny",
+      "Audit",
+      "Disabled"
+    ],
+    "defaultValue": "Audit"
+  }
+}
diff --git a/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.rules.json b/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.rules.json
new file mode 100644
index 00000000..24890705
--- /dev/null
+++ b/policyDefinitions/Tags/validate-date-tag-on-subscription/azurepolicy.rules.json
@@ -0,0 +1,17 @@
+{
+  "if": {
+    "allOf": [
+      {
+        "field": "type",
+        "equals": "Microsoft.Resources/subscriptions"
+      },
+      {
+        "field": "[concat('tags[',parameters('tagExpirationDate'), ']')]",
+        "notMatch": "####-##-##"
+      }
+    ]
+  },
+  "then": {
+    "effect": "[parameters('effect')]"
+  }
+}
diff --git a/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.json b/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.json
new file mode 100644
index 00000000..1a4857e5
--- /dev/null
+++ b/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.json
@@ -0,0 +1,59 @@
+{
+  "name": "151a7585-6199-43c8-887d-5f83dce26aa2",
+  "type": "Microsoft.Authorization/policyDefinitions",
+  "properties": {
+    "displayName": "Validate email tag on subscription",
+    "description": "Ensure subscription tag value for an email tag follows format *@domain.com.",
+    "metadata": {
+      "version": "1.0.0",
+      "category": "Tags"
+    },
+    "mode": "All",
+    "parameters": {
+      "tagEmail": {
+        "type": "String",
+        "metadata": {
+          "displayName": "tagEmail",
+          "description": "Name of the tag containing the email address, e.g. 'SubOwner-Email'"
+        }
+      },
+      "tagValueEmailDomain": {
+        "type": "String",
+        "metadata": {
+          "displayName": "emailDomain",
+          "description": "Enter the domain name of the email address, e.g. Accenture.com"
+        }
+      },
+      "effect": {
+        "type": "String",
+        "metadata": {
+          "displayName": "Effect",
+          "description": "Deny, Audit or Disabled the execution of the Policy"
+        },
+        "allowedValues": [
+          "Deny",
+          "Audit",
+          "Disabled"
+        ],
+        "defaultValue": "Audit"
+      }
+    },
+    "policyRule": {
+      "if": {
+        "allOf": [
+          {
+            "field": "type",
+            "equals": "Microsoft.Resources/subscriptions"
+          },
+          {
+            "field": "[concat('tags[',parameters('tagEmail'), ']')]",
+            "notLike": "[concat('*@',parameters('tagValueEmailDomain'))]"
+          }
+        ]
+      },
+      "then": {
+        "effect": "[parameters('effect')]"
+      }
+    }
+  }
+}
diff --git a/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.parameters.json b/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.parameters.json
new file mode 100644
index 00000000..22dc124f
--- /dev/null
+++ b/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.parameters.json
@@ -0,0 +1,29 @@
+{
+  "tagEmail": {
+    "type": "String",
+    "metadata": {
+      "displayName": "tagEmail",
+      "description": "Name of the tag containing the email address, e.g. 'SubOwner-Email'"
+    }
+  },
+  "tagValueEmailDomain": {
+    "type": "String",
+    "metadata": {
+      "displayName": "emailDomain",
+      "description": "Enter the domain name of the email address, e.g. Accenture.com"
+    }
+  },
+  "effect": {
+    "type": "String",
+    "metadata": {
+      "displayName": "Effect",
+      "description": "Deny, Audit or Disabled the execution of the Policy"
+    },
+    "allowedValues": [
+      "Deny",
+      "Audit",
+      "Disabled"
+    ],
+    "defaultValue": "Audit"
+  }
+}
diff --git a/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.rules.json b/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.rules.json
new file mode 100644
index 00000000..834f2340
--- /dev/null
+++ b/policyDefinitions/Tags/validate-email-tag-on-subscription/azurepolicy.rules.json
@@ -0,0 +1,17 @@
+{
+  "if": {
+    "allOf": [
+      {
+        "field": "type",
+        "equals": "Microsoft.Resources/subscriptions"
+      },
+      {
+        "field": "[concat('tags[',parameters('tagEmail'), ']')]",
+        "notLike": "[concat('*@',parameters('tagValueEmailDomain'))]"
+      }
+    ]
+  },
+  "then": {
+    "effect": "[parameters('effect')]"
+  }
+}
diff --git a/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.json b/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.json
new file mode 100644
index 00000000..618ad272
--- /dev/null
+++ b/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.json
@@ -0,0 +1,52 @@
+{
+  "name": "64b026ea-d1f4-429d-b580-8d41c760bece",
+  "type": "Microsoft.Authorization/policyDefinitions",
+  "properties": {
+    "displayName": "Validate length of subscription tag",
+    "description": "Validate the length of a subscription tag value.",
+    "metadata": {
+      "version": "1.0.0",
+      "category": "Tags"
+    },
+    "mode": "All",
+    "parameters": {
+      "tagCostCenter": {
+        "type": "String",
+        "metadata": {
+          "displayName": "tagCostCenter",
+          "description": "Name of the tag, e.g. CostCenter"
+        }
+      },
+      "effect": {
+        "type": "String",
+        "metadata": {
+          "displayName": "Effect",
+          "description": "Deny, Audit or Disabled the execution of the Policy"
+        },
+        "allowedValues": [
+          "Deny",
+          "Audit",
+          "Disabled"
+        ],
+        "defaultValue": "Audit"
+      }
+    },
+    "policyRule": {
+      "if": {
+        "allOf": [
+          {
+            "field": "type",
+            "equals": "Microsoft.Resources/subscriptions"
+          },
+          {
+            "value": "[string(length(field(concat('tags[', parameters('tagCostCenter'), ']'))))]",
+            "notEquals": "6"
+          }
+        ]
+      },
+      "then": {
+        "effect": "[parameters('effect')]"
+      }
+    }
+  }
+}
diff --git a/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.parameters.json b/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.parameters.json
new file mode 100644
index 00000000..5b51f9da
--- /dev/null
+++ b/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.parameters.json
@@ -0,0 +1,22 @@
+{
+  "tagCostCenter": {
+    "type": "String",
+    "metadata": {
+      "displayName": "tagCostCenter",
+      "description": "Name of the tag, e.g. CostCenter"
+    }
+  },
+  "effect": {
+    "type": "String",
+    "metadata": {
+      "displayName": "Effect",
+      "description": "Deny, Audit or Disabled the execution of the Policy"
+    },
+    "allowedValues": [
+      "Deny",
+      "Audit",
+      "Disabled"
+    ],
+    "defaultValue": "Audit"
+  }
+}
diff --git a/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.rules.json b/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.rules.json
new file mode 100644
index 00000000..afbe5ac9
--- /dev/null
+++ b/policyDefinitions/Tags/validate-length-of-subscription-tag/azurepolicy.rules.json
@@ -0,0 +1,17 @@
+{
+  "if": {
+    "allOf": [
+      {
+        "field": "type",
+        "equals": "Microsoft.Resources/subscriptions"
+      },
+      {
+        "value": "[string(length(field(concat('tags[', parameters('tagCostCenter'), ']'))))]",
+        "notEquals": "6"
+      }
+    ]
+  },
+  "then": {
+    "effect": "[parameters('effect')]"
+  }
+}