Wis. Stat. § 700.25: Applicability of chapter.

This chapter applies to interests in property in existence on July 1, 1971, and to interests in property created after such date. If application of any provision of this chapter to an interest in property in existence on July 1, 1971, is unconstitutional, it shall not affect application of the provision to an interest in property created after July 1, 1971.