Oregon Revised Statutes Public Lands § 274.835

It shall be a continuing condition of such lease that the lessee shall conform to all applicable laws of the State of Oregon and all duly promulgated rules and regulations pursuant thereto in effect at the date of the invitation for bids in pursuance of which the lease was awarded. Periodic mutual negotiations between lessee and lessor may be carried out to make conditions, rules and regulations current as warranted by changes in environment or operational methods.