"Condition" language creates executory interest, but new executory interests banned unless held by public or charitable entities

In White v. Auger,2019 N.H. LEXIS 4 (N.H. 2019), the grantor conveyed property to a grantee "on condition that" the grantee build on it (or on adjacent land) and live there (within 10 years) created a fee simple subject to executory limitation. State statutes abolished possibilities of reverter, rights of entry, and executory limitations unless the grantee is a public or charitable organization but that law did not apply retroactively. N.H. Rev. Stat. 477:3-b. Older future interests could continue if they were re-recorded as required by the statute.