diff --git a/extensions/amp-mustache/validator-amp-mustache.protoascii b/extensions/amp-mustache/validator-amp-mustache.protoascii
index c48de699a937..bca89f9b190b 100644
--- a/extensions/amp-mustache/validator-amp-mustache.protoascii
+++ b/extensions/amp-mustache/validator-amp-mustache.protoascii
@@ -77,6 +77,132 @@ tags: {
   disallowed_ancestor: "FORM DIV [submitting][template]"
   disallowed_ancestor: "FORM DIV [verify-error][template]"
   requires_extension: "amp-mustache"
+  attrs: {
+    name: "id"
+    add_value_to_set: TEMPLATE_IDS
+    # When updating this blacklisted_value_regex, also update elsewhere in this
+    # file, and in mandatory-id-attr and $GLOBAL_ATTRS in
+    # validator-main.protoascii, and validator-amp-script.protoascii.
+    blacklisted_value_regex: "(^|\\s)("  # Values are space separated
+        "__amp_\\S*|"
+        "__count__|"
+        "__defineGetter__|"
+        "__defineSetter__|"
+        "__lookupGetter__|"
+        "__lookupSetter__|"
+        "__noSuchMethod__|"
+        "__parent__|"
+        "__proto__|"
+        "__AMP_\\S*|"
+        "\\$p|"
+        "\\$proxy|"
+        "acceptCharset|"
+        "addEventListener|"
+        "appendChild|"
+        "assignedSlot|"
+        "attachShadow|"
+        "AMP|"
+        "baseURI|"
+        "checkValidity|"
+        "childElementCount|"
+        "childNodes|"
+        "classList|"
+        "className|"
+        "clientHeight|"
+        "clientLeft|"
+        "clientTop|"
+        "clientWidth|"
+        "compareDocumentPosition|"
+        "computedName|"
+        "computedRole|"
+        "contentEditable|"
+        "createShadowRoot|"
+        "enqueAction|"
+        "firstChild|"
+        "firstElementChild|"
+        "getAnimations|"
+        "getAttribute|"
+        "getAttributeNS|"
+        "getAttributeNode|"
+        "getAttributeNodeNS|"
+        "getBoundingClientRect|"
+        "getClientRects|"
+        "getDestinationInsertionPoints|"
+        "getElementsByClassName|"
+        "getElementsByTagName|"
+        "getElementsByTagNameNS|"
+        "getRootNode|"
+        "hasAttribute|"
+        "hasAttributeNS|"
+        "hasAttributes|"
+        "hasChildNodes|"
+        "hasPointerCapture|"
+        "i-amphtml-\\S*|"
+        "innerHTML|"
+        "innerText|"
+        "inputMode|"
+        "insertAdjacentElement|"
+        "insertAdjacentHTML|"
+        "insertAdjacentText|"
+        "isContentEditable|"
+        "isDefaultNamespace|"
+        "isEqualNode|"
+        "isSameNode|"
+        "lastChild|"
+        "lastElementChild|"
+        "lookupNamespaceURI|"
+        "namespaceURI|"
+        "nextElementSibling|"
+        "nextSibling|"
+        "nodeName|"
+        "nodeType|"
+        "nodeValue|"
+        "offsetHeight|"
+        "offsetLeft|"
+        "offsetParent|"
+        "offsetTop|"
+        "offsetWidth|"
+        "outerHTML|"
+        "outerText|"
+        "ownerDocument|"
+        "parentElement|"
+        "parentNode|"
+        "previousElementSibling|"
+        "previousSibling|"
+        "querySelector|"
+        "querySelectorAll|"
+        "releasePointerCapture|"
+        "removeAttribute|"
+        "removeAttributeNS|"
+        "removeAttributeNode|"
+        "removeChild|"
+        "removeEventListener|"
+        "replaceChild|"
+        "reportValidity|"
+        "requestPointerLock|"
+        "scrollHeight|"
+        "scrollIntoView|"
+        "scrollIntoViewIfNeeded|"
+        "scrollLeft|"
+        "scrollWidth|"
+        "setAttribute|"
+        "setAttributeNS|"
+        "setAttributeNode|"
+        "setAttributeNodeNS|"
+        "setPointerCapture|"
+        "shadowRoot|"
+        "styleMap|"
+        "tabIndex|"
+        "tagName|"
+        "textContent|"
+        "toString|"
+        "valueOf|"
+        "(webkit|ms|moz|o)dropzone|"
+        "(webkit|moz|ms|o)MatchesSelector|"
+        "(webkit|moz|ms|o)RequestFullScreen|"
+        "(webkit|moz|ms|o)RequestFullscreen"
+        ")(\\s|$)"
+  }
   attrs: {
     name: "type"
     mandatory: true
@@ -114,6 +240,132 @@ tags: {
   # AMP4EMAIL addition.
   disallowed_ancestor: "FORM DIV [submitting]"
   requires_extension: "amp-mustache"
+  attrs: {
+    name: "id"
+    add_value_to_set: TEMPLATE_IDS
+    # When updating this blacklisted_value_regex, also update elsewhere in this
+    # file, and in mandatory-id-attr and $GLOBAL_ATTRS in
+    # validator-main.protoascii, and validator-amp-script.protoascii.
+    blacklisted_value_regex: "(^|\\s)("  # Values are space separated
+        "__amp_\\S*|"
+        "__count__|"
+        "__defineGetter__|"
+        "__defineSetter__|"
+        "__lookupGetter__|"
+        "__lookupSetter__|"
+        "__noSuchMethod__|"
+        "__parent__|"
+        "__proto__|"
+        "__AMP_\\S*|"
+        "\\$p|"
+        "\\$proxy|"
+        "acceptCharset|"
+        "addEventListener|"
+        "appendChild|"
+        "assignedSlot|"
+        "attachShadow|"
+        "AMP|"
+        "baseURI|"
+        "checkValidity|"
+        "childElementCount|"
+        "childNodes|"
+        "classList|"
+        "className|"
+        "clientHeight|"
+        "clientLeft|"
+        "clientTop|"
+        "clientWidth|"
+        "compareDocumentPosition|"
+        "computedName|"
+        "computedRole|"
+        "contentEditable|"
+        "createShadowRoot|"
+        "enqueAction|"
+        "firstChild|"
+        "firstElementChild|"
+        "getAnimations|"
+        "getAttribute|"
+        "getAttributeNS|"
+        "getAttributeNode|"
+        "getAttributeNodeNS|"
+        "getBoundingClientRect|"
+        "getClientRects|"
+        "getDestinationInsertionPoints|"
+        "getElementsByClassName|"
+        "getElementsByTagName|"
+        "getElementsByTagNameNS|"
+        "getRootNode|"
+        "hasAttribute|"
+        "hasAttributeNS|"
+        "hasAttributes|"
+        "hasChildNodes|"
+        "hasPointerCapture|"
+        "i-amphtml-\\S*|"
+        "innerHTML|"
+        "innerText|"
+        "inputMode|"
+        "insertAdjacentElement|"
+        "insertAdjacentHTML|"
+        "insertAdjacentText|"
+        "isContentEditable|"
+        "isDefaultNamespace|"
+        "isEqualNode|"
+        "isSameNode|"
+        "lastChild|"
+        "lastElementChild|"
+        "lookupNamespaceURI|"
+        "namespaceURI|"
+        "nextElementSibling|"
+        "nextSibling|"
+        "nodeName|"
+        "nodeType|"
+        "nodeValue|"
+        "offsetHeight|"
+        "offsetLeft|"
+        "offsetParent|"
+        "offsetTop|"
+        "offsetWidth|"
+        "outerHTML|"
+        "outerText|"
+        "ownerDocument|"
+        "parentElement|"
+        "parentNode|"
+        "previousElementSibling|"
+        "previousSibling|"
+        "querySelector|"
+        "querySelectorAll|"
+        "releasePointerCapture|"
+        "removeAttribute|"
+        "removeAttributeNS|"
+        "removeAttributeNode|"
+        "removeChild|"
+        "removeEventListener|"
+        "replaceChild|"
+        "reportValidity|"
+        "requestPointerLock|"
+        "scrollHeight|"
+        "scrollIntoView|"
+        "scrollIntoViewIfNeeded|"
+        "scrollLeft|"
+        "scrollWidth|"
+        "setAttribute|"
+        "setAttributeNS|"
+        "setAttributeNode|"
+        "setAttributeNodeNS|"
+        "setPointerCapture|"
+        "shadowRoot|"
+        "styleMap|"
+        "tabIndex|"
+        "tagName|"
+        "textContent|"
+        "toString|"
+        "valueOf|"
+        "(webkit|ms|moz|o)dropzone|"
+        "(webkit|moz|ms|o)MatchesSelector|"
+        "(webkit|moz|ms|o)RequestFullScreen|"
+        "(webkit|moz|ms|o)RequestFullscreen"
+        ")(\\s|$)"
+  }
   attrs: {
     name: "type"
     mandatory: true
@@ -156,8 +408,9 @@ tags: {
   attrs: {
     name: "id"
     add_value_to_set: TEMPLATE_IDS
-    # When updating this blacklisted_value_regex, also update below, and in
-    # mandatory-id-attr and $GLOBAL_ATTRS in validator-main.protoascii.
+    # When updating this blacklisted_value_regex, also update elsewhere in this
+    # file, and in mandatory-id-attr and $GLOBAL_ATTRS in
+    # validator-main.protoascii, and validator-amp-script.protoascii.
     blacklisted_value_regex: "(^|\\s)("  # Values are space separated
         "__amp_\\S*|"
         "__count__|"
@@ -308,8 +561,9 @@ tags: {
   attrs: {
     name: "id"
     add_value_to_set: TEMPLATE_IDS
-    # When updating this blacklisted_value_regex, also update above, and in
-    # mandatory-id-attr and $GLOBAL_ATTRS in validator-main.protoascii.
+    # When updating this blacklisted_value_regex, also update elsewhere in this
+    # file, and in mandatory-id-attr and $GLOBAL_ATTRS in
+    # validator-main.protoascii, and validator-amp-script.protoascii.
     blacklisted_value_regex: "(^|\\s)("  # Values are space separated
         "__amp_\\S*|"
         "__count__|"
diff --git a/extensions/amp-script/validator-amp-script.protoascii b/extensions/amp-script/validator-amp-script.protoascii
index 7e7d1211b48d..9725ae2e24ee 100644
--- a/extensions/amp-script/validator-amp-script.protoascii
+++ b/extensions/amp-script/validator-amp-script.protoascii
@@ -33,6 +33,9 @@ tags: {  # <amp-script> (local script)
     name: "id"
     add_value_to_set: AMP_SCRIPT_IDS
     mandatory: true
+    # When updating this blacklisted_value_regex, also update for
+    # mandatory-id-attr and $GLOBAL_ATTRS in validator-main.protoascii, and
+    # validator-amp-mustache.protoascii.
     blacklisted_value_regex: "(^|\\s)("  # Values are space separated
         "__amp_\\S*|"
         "__count__|"
diff --git a/validator/validator-main.protoascii b/validator/validator-main.protoascii
index 812f9c6ab236..36d5b2648de1 100644
--- a/validator/validator-main.protoascii
+++ b/validator/validator-main.protoascii
@@ -5485,7 +5485,8 @@ attr_lists: {
     name: "id"
     mandatory: true
     # When updating this blacklisted_value_regex, also update the entry for
-    # "id" in $GLOBAL_ATTRS and "id" in "amp-script extension local script".
+    # "id" in $GLOBAL_ATTRS, and also validator-amp-script.protoascii and
+    # validator-amp-mustache.protoascii.
     blacklisted_value_regex: "(^|\\s)("  # Values are space separated
         "__amp_\\S*|"
         "__count__|"
@@ -6517,7 +6518,8 @@ attr_lists: {
   attrs: {
     name: "id"
     # When updating this blacklisted_value_regex, also update for
-    # mandatory-id-attr and validator-amp-mustache.protoascii.
+    # mandatory-id-attr, validator-amp-script.protoascii, and
+    # validator-amp-mustache.protoascii.
     blacklisted_value_regex: "(^|\\s)("  # Values are space separated
         "__amp_\\S*|"
         "__count__|"