All reports of debian-news-file-uses-obsolete-national-encoding for the archive. The extended description of this tag is:
The NEWS.Debian file must be valid UTF-8, an encoding of the Unicode character set.
There are many ways to convert a changelog from an obsoleted encoding like ISO-8859-1; you may for example use "iconv" like:$ iconv -f ISO-8859-1 -t UTF-8 NEWS.Debian > NEWS.Debian.new $ mv NEWS.Debian.new NEWS.Debian
This tag has not been emitted in any package tested by Lintian.