Loans on one family dwellings secured by mortgages or deeds of trust or investments therein shall be amortized within not more than thirty years and two months by payments of installments thereon at regular intervals not less frequent than every three months; except those guaranteed or insured in whole or in part by the Federal Housing Administration, the Administrator of Veterans' Affairs or the Farmers Home Administration.
[1969 ex.s. c 241 § 6; 1967 c 150 § 10.]