When in any deed or contract for sale a county has reserved or excepted an interest in oil and gas in and under any land acquired by tax deed, the board of county commissioners may lease such interest for oil and gas development purposes upon the same terms and conditions as are provided for the leasing of lands which have been acquired by tax deed, offered for sale and not sold or may ratify, confirm, and adopt any then-existing mineral or oil and gas lease insofar as it describes such land. All such leases, ratifications, confirmations, and adoptions heretofore executed by the board of county commissioners are declared to be valid and are ratified, approved, and confirmed.
§ 82-10-204, MCA