The time when the enjoyment of property is to begin or end may be determined by computation, or be made to depend on event. In the latter case, the enjoyment is said to be upon condition.
Mont. Code Ann. § 70-1-401
Fixing time of enjoyment -- computation -- condition
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.