(a) Management and Sales Types and Investor Sponsored Projects. The mortgagee, upon the initial endorsement of the mortgage for insurance, shall pay to the Commissioner a first mortgage insurance premium equal to one-half of one percent of the original face amount of the mortgage.

(b) Purchasing cooperatives. The provisions of paragraph (a) of this section do not apply to the mortgage or a purchasing nonprofit cooperative housing corporation or trust where such mortgage is endorsed for insurance pursuant to the sale of an Investor Sponsored Project to such purchasing nonprofit cooperative housing corporation or trust.

(c) Existing Construction. The provisions of paragraph (a) of the section shall apply to a mortgage covering Existing Construction which involves insurance of advances for Commissioner approved or required repairs, improvements, alterations and additions.

(d) Operating loss loans and supplementary loans. The provisions of paragraph (a) of this section shall apply to any operating loss loan and to any supplementary loan, except a supplementary loan to finance the acquisition of an existing community facility.