For purposes of this article:
(a) The term "agency office" or "direct agency office" means an office of a foreign bank that is exercising the powers set forth and authorized by sections seven and eleven of this article.
(b) The term "bank supervisory agency" means:
(1) The office of the comptroller of the currency, the federal deposit insurance corporation, the board of Governors of the federal reserve system and any successor to these agencies;