All reports of new-essential-package for the archive. The extended description of this tag is:

This package has the Essential flag set. New Essential packages are sufficiently rare that it seems worth warning about. They should be discussed on debian-devel first.

Refer to Debian Policy Manual section 3.8 (Essential packages) for details.

Severity: important, Certainty: possible

Check: fields, Type: binary, udeb, source

This tag has not been emitted in any package tested by Lintian.