The tag is present in Lintian version 2.104.328. That is the most recent version we know about.
The data portion of this binary package uses a non-compressed format. Although dpkg will support extracting such binary packages since dpkg 1.10.24, creating them is not advised except in special cases.
Except if data is non-compressible, use gzip for maximum compatibility and speed, and xz for maximum compression ratio.
Please refer to the deb(5) manual page for details.