This chapter applies prospectively only. RCW 65.20.030 applies to all security interests perfected on or after March 1, 1990. This chapter applies to the sale or transfer of manufactured homes on or after March 1, 1990, where all of the existing ownership rights and interests in the manufactured home are terminated in favor of new and different owners, or where persons who own a manufactured home on or after March 1, 1990, voluntarily elect to eliminate the title to the manufactured home under this chapter.