These regulations apply to mortgage loans financed through the Mortgage Yield Account of the Fund. The loans: Are not subject to the Internal Revenue Code; Are mortgage investments under the General Bond Certificate as described in Regulation .03B(13) of this chapter or mortgage loans that otherwise meet the requirements of the General Bond Certificate; Are pledged to the bond holders under the General Bond Certificate; May be ineligible for financing with proceeds of the Administration's mortgage revenue bonds or through other mortgage programs of the Department; Enable borrowers to acquire, rehabilitate, and refinance owner-occupied residential housing of one to four units; and May be made for acquisition of residential housing of one to four units in a project in accordance with forward commitments to developers for permanent take-out financing under the SPIF program.