{"data":{"id":"us/43-cfr-3861.2-4","jurisdiction":"us","citation":"43 CFR 3861.2-4","heading":"-4 Supplemental proof of expenditures and improvements.","body":"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.","path":["Title 43—Public Lands: Interior","Subtitle B—Regulations Relating to Public Lands","CHAPTER II—BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR","SUBCHAPTER C—MINERALS MANAGEMENT (3000)","PART 3860—MINERAL PATENT APPLICATIONS","Subpart 3861—Surveys and Plats"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-43.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:15Z","sha256":"5c6b3e2994da3135bde08348292c9347e872db2604df62c065fb5f85d54b80ff","source_id":"us-cfr","stale":true,"prev":"us/43-cfr-3861.2-3","next":"us/43-cfr-3861.2-5"},"notice":"GroundRules: Original legal text. Not legal advice."}