The Montana coordinate system NAD 83 may not be used to define the position of a point on a land boundary for any publicly recorded instrument more than 1 year after the date that SPCS2022 is adopted by NGS as an official part of the NSRS. The Montana plane coordinate system as defined by NGS or its successors is the sole system to be used after this date.
Mont. Code Ann. § 70-22-211
Limit on use of Montana coordinate system NAD 83
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.