the certificate credit rate for any mortgage credit certificate issued under such program shall not exceed 20 percent unless the issuing authority submits a plan to the Commissioner to ensure that the weighted average of the certificate credit rates in such mortgage credit certificate program does not exceed 20 percent and the Commissioner approves such plan. For purposes of determining the average annual aggregate principal amount of mortgages executed during the immediately preceding 3 calendar years for single-family owner-occupied residences located within the jurisdiction of such State, an issuer may rely upon the amount published by the Treasury Department for such calendar years. An issuer may rely on a different amount from that safe-harbor limitation where the issuer has made a more accurate and comprehensive determination of that amount. The weighted average of the certificate credit rates in a mortgage credit certificate program is determined by dividing the sum of the products obtained by multiplying the certificate credit rate of each certificate by the certified indebtedness amount with respect to that certificate by the sum of the certified indebtedness amounts of the certificates issued. See section 103A(g) and the regulations thereunder for the definition of the term "State ceiling".
Example. City Z issues four qualified mortgage credit certificates pursuant to its qualified mortgage credit certificate program. H receives a certificate with a certificate credit rate of 30 percent and a certified indebtedness amount of $50,000. I receives a certificate with a certificate credit rate of 25 percent and a certified indebtedness amount of $100,000. J and K each receive certificates with certificate credit rates of 10 percent; their certified indebtedness amounts are $50,000 and $100,000, respectively. The weighted average of the certificate credit rates is determined by dividing the sum of the products obtained by multiplying the certificate credit rate of each certificate by the certified indebtedness amount with respect to that certificate ((.3 * $50,000) + (.25 * $100,000) + (.1 * $50,000) + (.1 * $100,000)) by the sum of the certified indebtedness amounts of the certificates issued ($50,000 + $100,000 + $50,000 + $100,000). Thus, the weighted average of the certificate credit rates is 18.33 percent ($55,000/$300,000).
Example. On March 1, 1986, State X, pursuant to its qualified mortgage credit certificate program, provides a mortgage credit certificate to B. State X specifies that the maximum amount of the mortgage loan for which B may claim a credit is $65,000. On March 15, B purchases for $67,000 a single-family dwelling for use as his principal residence. B obtains from Bank M a mortgage loan for $60,000. State X, or Bank M acting on behalf of State X, indicates on B's mortgage credit certificate that the certified indebtedness amount of B's loan is $60,000. B may claim a credit under section 25 (e) based on this amount.
26 C.F.R. §1.25-2T