Ok, I think I have it:
PART 337—UNSAFE AND UNSOUND BANKING PRACTICES (FDIC Rules and Regulations)
§ 337.3 Limits on extensions of credit to executive officers, directors, and principal shareholders of insured nonmember banks.
(a) With the exception of 12 CFR 215.5(b), 215.5(c)(3), 215.5(c)4, and 215.11, insured nonmember banks are subject to the restrictions contained in subpart A of Federal Reserve Board Regulation O (12 CFR Part 215, subpart A) to the same extent and to the same manner as though they were member banks.
Let me know if I'm still waaaay off base though. Thanks.