41 Pa. Stat. § 605
This act shall take effect immediately except that sections 401, 403 and 404 shall take effect in sixty days. Notwithstanding any other provision of this act, the Secretary of Banking, immediately upon final enactment of this act, shall determine the maximum lawful rate of interest for residential mortgages as provided in section 301 of this act, for the month in which this act becomes effective and for the next succeeding month. Such rates shall be immediately published in the Pennsylvania Bulletin and shall become effective upon such publication for the respective months. Thereafter the secretary shall determine and publish the maximum lawful rate of interest for residential mortgages in conformity with the other provisions of this act.
41 P.S. § 605