Sec. 9. (a) This section applies to each restriction, reservation, condition, exception, or covenant that is created before April 1, 1988, in any subdivision plat, deed, or other instrument of, or pertaining to, the transfer, sale, lease, or use of property.
(b) A restriction, a reservation, a condition, an exception, or a covenant in a subdivision plat, deed, or other instrument of, or pertaining to, the transfer, sale, lease, or use of property that would permit the residential use of property but prohibit the use of that property as a residential facility for individuals with a developmental disability or individuals with a mental illness:
(1) on the ground that the residential facility is a business;
(2) on the ground that the individuals residing in the residential facility are not related; or
(3) for any other reason;
is, to the extent of the prohibition, void as against the public policy of the state.