The Comptroller of the Currency shall, within fifteen days from the time of notice of his appointment, take and subscribe the oath of office.
(R.S. § 326; Pub. L. 86–251, § 1(d), Sept. 9, 1959, 73 Stat. 488; Pub. L. 92–310, title II, § 223(a), June 6, 1972, 86 Stat. 206.)