All of the provisions of this subpart are applicable to mortgages insured under the provisions of § 203.45 except as provided in this section.

(a) Beginning of Amortization means the date one month prior to the date of the first monthly payment to principal or interest.

(b) The phrases unpaid principal balance of the loan or principal of the mortgage which was unpaid as used in this subpart, shall be construed to refer to the outstanding mortgage amount as increased by any accrued mortgage interest which was unpaid pursuant to a financing plan approved by the Secretary.