Per the Fire Guru's interp, 'Fire Caulk' not required in SFD, (single fam dwelling, stand alone). IF it's a multi-family, with fire rated construction, then 'Fire Caulk' is req.
To the best of his knowledge, there is NO rules for what you asked.
The above is an opinion of a Fire Sub-Code Official, not mine.
UL Fire Resistance Directory may shed some additional light. YOU could call UL
1-800-595-9844 for info; they are helpful.
Hope this helps