The tag is present in Lintian version 2.104.244. That is the most recent version we know about.
A Debian package that provides a
directory must install a changelog file.
For native packages the best name is
For non-native packages the best name is
This tag may also be emitted when the changelog exists but does not otherwise resemble a Debian changelog.
Refer to Debian Policy Manual section 12.7 for details.