This final rule makes conforming revisions to the regulations under the single family mortgage insurance program with respect to the payment of interest at the debenture rate for mortgage insurance claims. The revisions implement a recent statutory amendment to the National Housing Act that provides for a mandatory change in the calculation of all debenture interest on mortgage insurance claims paid in cash. The statutory change mandates that, when paying insurance claims in cash, debenture interest rates for such claims must be the monthly average yield, for the month in which the default on the mortgage occurred, on United States Treasury Securities adjusted to a constant maturity of 10 years.