The post-employment restrictions set forth in section 10(k) of the FDI Act (12 U.S.C. 1820(k)) and § 4.74 do not apply to any officer or employee of the OCC, or any former officer or employee of the OCC, if the Comptroller of the Currency certifies, in writing and on a case-by-case basis, that granting the individual a waiver of the restrictions would not affect the integrity of the OCC's supervisory program.