There may be filed for record in the office of the county auditor in the county in which the land lies any of the following: (1) Copies of any plat of established farm units approved by the secretary as provided in RCW 89.12.040, when authenticated in the manner authorized by law; (2) copies of any instrument, action, determination, rule or regulation of the secretary made in connection with the provisions of RCW 89.12.050 or otherwise under the federal reclamation laws and which is or may be determinative of title to lands or interest in lands, when authenticated in the manner authorized by law; and (3) any contract or instrument required to be executed by an owner, land purchaser or other person in connection with provisions incorporated in repayment contracts between a district and the United States as authorized by RCW 89.12.050. Such filing shall impart legal notice to the public of the matters and things set out therein.