OP here. Yes, have reviewed the CoC. As noted in the OP, am interested to learn if someone can provide the official and documented [internal] policy and/or UA profile name. Pre-merger, FT members posted in various wikis some of the Star profiles for IRROPS, etc. No one at UA seems to know WHAT their actual policy is (FYI, the CoC doesn't identify every UA policy/guideline). I've heard that when reaccom is on a different carrier, they'll reprotect into business on (1) any other carrier, (2) only Star carriers, (3) only UA immunised JV carriers, except for LH, (4) UA if any C seat is bookable, and (5) UA only if R space is avail. Surely there has to be some sort of internal policy that's documented for this.