All of the provisions of §§ 207.252 and 207.252a of this chapter, relating to mortgage insurance premiums, apply to mortgages insured under this subpart that provide for interest at the market rate prescribed in § 221.518(a) except that as to mortgages insured under this subpart pursuant to section 238(c) of the Act all mortgage insurance premiums due in accordance with §§ 207.252 and 207.252a shall be calculated on the basis of one percent. The provisions of § 207.252 . shall not apply to:
24 C.F.R. §221.755