43 C.F.R. § 3861.2-4 Supplemental proof of expenditures and improvements.
Title 43 - Public Lands: Interior
If the value of the labor and improvements upon a mineral claim is less than $500 at the time of survey the mineral surveyor may file with the cadastral engineer supplemental proof showing $500 expenditure made prior to the expiration of the period of publication.
Title 43: Public Lands: Interior
PART 3860—MINERAL PATENT APPLICATIONS
Subpart 3861—Surveys and Plats
§ 3861.2-4 Supplemental proof of expenditures and improvements.
