This act shall not alter or amend any provision of Act No. 21 of the Public Acts of 1939, as amended, being section 493.1 to 493.26 of the Compiled Laws of 1948, or permit any premium, contribution or other charge to be collected for credit life or health and accident insurance in connection with loans made by licensees under said act: Provided, however, That if section 13 of said Act No. 21 of the Public Acts of 1939, as amended, is amended to permit licensees to collect premiums from borrowers for credit life insurance or credit health and accident insurance in addition to the maximum rate of charge authorized by said section 13, this act shall apply to licensees as provided by such amendment to section 13.