are packages installable from testing accepted into bpo?
I was asked to sponsor an upload to squeeze-backports for a package
currently in testing. I remembered that once a requirement existed for bpo
that a package should only be uploaded to bpo if it isn't installable from
testing directly (i.e., via pinning).
We found that this was indeed mentioned, but that was over 5 years ago.
Also, current rules do not list this requirement, and some recent
backports we checked were in fact installable from testing aswell.
Is it ok to assume that this requirement no longer holds?