Index: include/httpd.h
===================================================================
--- include/httpd.h	(revision 1729438)
+++ include/httpd.h	(working copy)
@@ -532,6 +532,7 @@
 #define HTTP_PRECONDITION_REQUIRED           428
 #define HTTP_TOO_MANY_REQUESTS               429
 #define HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE 431
+#define HTTP_UNAVAILABLE_FOR_LEGAL_REASONS   451
 #define HTTP_INTERNAL_SERVER_ERROR           500
 #define HTTP_NOT_IMPLEMENTED                 501
 #define HTTP_BAD_GATEWAY                     502
Index: modules/http/http_protocol.c
===================================================================
--- modules/http/http_protocol.c	(revision 1729438)
+++ modules/http/http_protocol.c	(working copy)
@@ -146,7 +146,27 @@
     "429 Too Many Requests",
     NULL, /* 430 */
     "431 Request Header Fields Too Large",
-#define LEVEL_500 71
+    NULL, /* 432 */
+    NULL, /* 433 */
+    NULL, /* 434 */
+    NULL, /* 435 */
+    NULL, /* 436 */
+    NULL, /* 437 */
+    NULL, /* 438 */
+    NULL, /* 439 */
+    NULL, /* 440 */
+    NULL, /* 441 */
+    NULL, /* 442 */
+    NULL, /* 443 */
+    NULL, /* 444 */
+    NULL, /* 445 */
+    NULL, /* 446 */
+    NULL, /* 447 */
+    NULL, /* 448 */
+    NULL, /* 449 */
+    NULL, /* 450 */
+    "451 Unavailable For Legal Reasons",
+#define LEVEL_500 91
     "500 Internal Server Error",
     "501 Not Implemented",
     "502 Bad Gateway",
@@ -1313,6 +1333,13 @@
                "request as the requested host name does not match\n"
                "the Server Name Indication (SNI) in use for this\n"
                "connection.</p>\n");
+    case HTTP_UNAVAILABLE_FOR_LEGAL_REASONS:
+        s1 = apr_pstrcat(p,
+                         "<p>Access to ",
+                         ap_escape_html(r->pool, r->uri),
+                         "\nhas been denied for legal reasons.<br />\n",
+                         NULL);
+        return(add_optional_notes(r, s1, "error-notes", "</p>\n"));
     default:                    /* HTTP_INTERNAL_SERVER_ERROR */
         /*
          * This comparison to expose error-notes could be modified to