/etc/insserv/overrides/ntp is in debian-edu-config 1.818+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | # BTS #585772
### BEGIN INIT INFO
# Provides: ntp
# Required-Start: $network $remote_fs $syslog
# Required-Stop: $network $remote_fs $syslog
# Should-Start: $named
# Default-Start: 2 3 4 5
# Default-Stop:
# Short-Description: Start NTP daemon
### END INIT INFO
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