The cover letter is never guaranteed to have this kind of information in but it is always worth reading as it might have something key in there.
Even if a TF was used in a ONE-OFF only, the TF meaning should never be reversed as a rule. If this ever happens it's a mistake, documented or otherwise.
Thou shalt not re-use a TF.
Thou shalt not reverse the meaning if a TF.
Those are the commandments engineering are supposed to live by with respect to TFs.