The info in this thread could be the starting point for this page: http://lists.debian.org/debian-mentors/2006/09/msg00223.html

A further example: NonMaintainerUpload

What are binNMUs?

A binNMU is a binary-only non-maintainer upload. In this case the arch: any packages are rebuild, but the arch: all packages are not. This is necessary for cases, where a simple rebuild (without any changes to the package) will fix a serious error (an [http://lists.debian.org/debian-release/2006/09/msg00003.html example]).

How to make packages binNMU safe?

Where to request a binNMU?

To request a binNMU ask for it on the [http://lists.debian.org/debian-release/ debian-release mailing list].