All of the definitions contained in § 232.500 shall apply to this subpart. In addition, as used in this subpart, the following term shall have the meaning indicated:

(a) Contract of insurance means the agreement evidenced by the endorsement of the Commissioner upon the note given in connection with an insured loan and includes the provisions of this subpart and the applicable provisions of the Act.

(b) Maturity means the date on which the loan indebtedness would be extinguished if paid in accordance with periodic payments provided for in the loan.