diff --git a/bind.keys b/bind.keys
index 7ee1e31..c06e2ec 100644
--- a/bind.keys
+++ b/bind.keys
@@ -1,45 +1,44 @@
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# SPDX-License-Identifier: MPL-2.0
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, you can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
 # The bind.keys file is used to override the built-in DNSSEC trust anchors
 # which are included as part of BIND 9.  The only trust anchors it contains
 # are for the DNS root zone (".").  Trust anchors for any other zones MUST
 # be configured elsewhere; if they are configured here, they will not be
 # recognized or used by named.
 #
-# The built-in trust anchors are provided for convenience of configuration.
-# They are not activated within named.conf unless specifically switched on.
-# To use the built-in key, use "dnssec-validation auto;" in the
-# named.conf options.  Without this option being set, the keys in this
-# file are ignored.
+# To use the built-in root key, set "dnssec-validation auto;" in the
+# named.conf options, or else leave "dnssec-validation" unset.  If
+# "dnssec-validation" is set to "yes", then the keys in this file are
+# ignored; keys will need to be explicitly configured in named.conf for
+# validation to work.  "auto" is the default setting, unless named is
+# built with "configure --disable-auto-validation", in which case the
+# default is "yes".
 #
 # This file is NOT expected to be user-configured.
 #
-# These keys are current as of October 2017.  If any key fails to
-# initialize correctly, it may have expired.  In that event you should
-# replace this file with a current version.  The latest version of
-# bind.keys can always be obtained from ISC at https://www.isc.org/bind-keys.
+# Servers being set up for the first time can use the contents of this file
+# as initializing keys; thereafter, the keys in the managed key database
+# will be trusted and maintained automatically.
 #
-# See https://data.iana.org/root-anchors/root-anchors.xml
-# for current trust anchor information for the root zone.
-
-managed-keys {
-        # This key (19036) is to be phased out starting in 2017. It will
-        # remain in the root zone for some time after its successor key
-        # has been added. It will remain this file until it is removed from
-        # the root zone.
-        . initial-key 257 3 8 "AwEAAagAIKlVZrpC6Ia7gEzahOR+9W29euxhJhVVLOyQbSEW0O8gcCjF
-                FVQUTf6v58fLjwBd0YI0EzrAcQqBGCzh/RStIoO8g0NfnfL2MTJRkxoX
-                bfDaUeVPQuYEhg37NZWAJQ9VnMVDxP/VHL496M/QZxkjf5/Efucp2gaD
-                X6RS6CXpoY68LsvPVjR0ZSwzz1apAzvN9dlzEheX7ICJBBtuA6G3LQpz
-                W5hOA2hzCTMjJPJ8LbqF6dsV6DoBQzgul0sGIcGOYl7OyQdXfZ57relS
-                Qageu+ipAdTTJ25AsRTAoub8ONGcLmqrAmRLKBP1dfwhYB4N7knNnulq
-                QxA+Uk1ihz0=";
+# These keys are current as of Mar 2019.  If any key fails to initialize
+# correctly, it may have expired.  In that event you should replace this
+# file with a current version.  The latest version of bind.keys can always
+# be obtained from ISC at https://www.isc.org/bind-keys.
+#
+# See https://data.iana.org/root-anchors/root-anchors.xml for current trust
+# anchor information for the root zone.
 
+trust-anchors {
         # This key (20326) was published in the root zone in 2017.
-        # Servers which were already using the old key (19036) should
-        # roll seamlessly to this new one via RFC 5011 rollover. Servers
-        # being set up for the first time can use the contents of this
-        # file as initializing keys; thereafter, the keys in the
-        # managed key database will be trusted and maintained
-        # automatically.
         . initial-key 257 3 8 "AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3
                 +/4RgWOq7HrxRixHlFlExOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kv
                 ArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgCmr3EgVLrjyBxWezF