Okla. Admin. Code § 330:10-13-2
(a) No more than approximately seventy-five percent (75%) of the aggregate principal amount of mortgage loans will represent mortgage loans, the original principal amount of which is greater than 90% of the initial appraised value of the property or the purchase price, whichever is less. In addition, except for VA-guaranteed mortgage loans, the original principal amount of each of the mortgage loans will not exceed 95% of the lesser of the initial appraised value of the property or the purchase price. No more than approximately twenty (20%) of the aggregate principal amount of the mortgage loans will represent mortgage loans on planned unit developments, condominiums and eligible manufactured housing. However,
(b) The Mortgage Subsidy Bond Tax Act of 1980, which added Section 103A to the Internal Revenue Code of 1954, as amended, and the Tax Equity and Fiscal Responsibility Act of 1982 which amended such Section, together with the temporary and proposed regulations promulgated thereunder (herein referred to as the "Tax Act" or "Section 103A"), impose significant requirements and restrictions upon the Agency with respect to single family mortgage loans that can be originated with the proceeds of obligations the interest on which is excludable from the gross income of the recipient for federal income tax purposes. Under the limitations imposed by the Tax Act, among other things,