Tennessee Code Title 13. Public Planning and Housing § 13-22-115

(a) The agency may insure mortgages containing provisions for varying rates of amortization corresponding to anticipated variations in family income to the extent such mortgages:

(b) Graduated payment mortgages insured by the agency pursuant to this section shall comply with the rules and regulations promulgated by the secretary of housing and urban development pursuant to 12 U.S.C. § 1715b and 12 U.S.C. § 1715z-10 [repealed]; provided, that this section shall only be applicable to first mortgages.