(1) To effectuate the public policy of chapter 70.128 RCW, the governing documents may not limit, directly or indirectly:

(a) Persons with disabilities from living in an adult family home licensed under chapter 70.128 RCW; or

(b) Persons and legal entities from operating adult family homes licensed under chapter 70.128 RCW, whether for-profit or nonprofit, to provide services covered under chapter 70.128 RCW. However, this subsection does not prohibit application of reasonable nondiscriminatory regulation, including but not limited to landscaping standards or regulation of sign location or size, that applies to all residential property subject to the governing documents.

(2) This section applies retroactively to any governing documents in effect on July 26, 2009. Any provision in a governing document in effect on or after July 26, 2009, that is inconsistent with subsection (1) of this section is unenforceable to the extent of the conflict.