All bonds of depositories shall be given for the term of two years from the date of their approval by the county board, and renewed every two years thereafter; but in counties having no depository, the board may advertise for proposals and designate depositories at any time when required by the public interests.
Minn. Stat. § 385.10
(849) RL s 503; 1909 c 104 s 1; 1967 c 409 s 6