Schema.org Vocabulary › Property: legislationDateVersion
https://schema.org/legislationDateVersion
The point-in-time at which the provided description of the legislation is valid (e.g.: when looking at the law on the 2016-04-07 (= dateVersion), I get the consolidation of 2015-04-12 of the "National Insurance Contributions Act 2015")
Domain: Legislation
Range: Date