(a) First premium. The lender, upon the initial endorsement of the loan for insurance, shall pay to the Commissioner a first loan insurance premium equal to one-half of one percent of the original face amount of the note.

(b) Second premium; first payment more than one year following initial endorsement. If the date of the first principal payment is more than one year following the date of initial insurance endorsement, the lender, upon the anniversary of such insurance date, shall pay a second premium equal to one-half of one percent of the original face amount of the loan.

(c) Third premium. On the date of the first principal payment, the lender shall pay a third premium equal to one-half of one percent of the average outstanding principal obligation of the note for the following year which shall be adjusted so as to accord with such date and so that the aggregate of the three premiums shall equal the sum of (1) one percent of the average outstanding principal obligation of the note for the year following the date of initial insurance endorsement and (2) one-half of one percent per annum of the average outstanding principal obligation of the note for the period from the first anniversary of the date of initial insurance endorsement to one year following the date of the first principal payment.

(d) Second premium; first payment one year or less following initial endorsement. If the date of the first principal payment is one year, or less than one year following the date of initial insurance endorsement, the lender upon such first principal payment date, shall pay a second premium equal to one-half of one percent of the average outstanding principal obligation of the note for the following year which shall be adjusted so as to accord with such date and so that the aggregate of the said two premiums shall equal the sum of (1) one percent per annum of the average outstanding principal obligation of the note for the period from the date of initial insurance endorsement to the date of first principal payment and (2) one-half of one percent of the average outstanding principal obligation of the note for the year following the date of the first principal payment.

(e) Second premium; commitment to insure upon completion. Where the note is initially and finally endorsed for insurance pursuant to a Commitment to Insure Upon Completion, the lender on the date of the first principal payment shall pay a second premium equal to one-half of one percent of the average outstanding principal obligation of the note for the year following such first principal payment date which shall be adjusted so as to accord with such date and so that the aggregate of the said two premiums shall equal the sum of one-half of one percent per annum of the average outstanding principal obligation of the note for the period from the date of the insurance endorsement to one year following the date of the first principal payment.

(f) Annual insurance premium. Until the note is paid in full, or until the loan is assigned to the Commissioner, or until the contract of insurance is otherwise terminated with the consent of the Commissioner, the lender, on each anniversary of the date of the first principal payment shall pay an annual loan insurance premium equal to one-half of one percent of the average outstanding principal obligation of the loan for the year following the date on which such premium becomes payable.

(g) Method of premium payment. Premiums shall be payable in cash or in debentures at par plus accrued interest. All premiums are payable in advance and no refund can be made of any portion thereof except as hereinafter provided in §§ 220.800 et seq.

(h) Calculation of premiums. The premiums payable on and after the date of the first principal payment shall be calculated in accordance with the amortization provisions without taking into account delinquent payments or prepayments.