The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
This script apparently runs an init script directly rather than using invoke-rc.d. The use of invoke-rc.d to invoke the /etc/init.d/* initscripts instead of calling them directly is required. Maintainer scripts may call the init script directly only if invoke-rc.d is not available.
Please refer to Debian Policy Manual section 18.104.22.168 for details.