(b) A governing body of a municipality or a county, and a planning commission, cannot discriminate in regard to housing and cannot require a group residential facility or its owner or operator, to obtain a conditional use permit, special use permit, special exception or variance to locate a group residential facility in a zone or district where single family dwelling units or multi-family dwelling units are permitted.
(c) The provisions of this section do not exempt any group residential facility from the structural requirements of any bona fide historic preservation district.