(a) No savings and loan association or savings bank may make any investment under this section if the association's aggregate outstanding investment in a service corporation would exceed 3% of the association's assets. Not less than 1 / 2 of the investment permitted under this section that exceeds 1% of the association's assets shall be used primarily for community, inner city, and community-development purposes.
(b) This section shall be a part of and supplemental to the state banking code.