If for any reason a selection of depositaries for all the funds and moneys of a seven-director district is not made at the time fixed by sections 165.201 to 165.291, the board, at any subsequent time, after twenty days’ notice, as herein provided, may receive bids and select depositaries for the parts of the funds and moneys of the districts for which no depositary has been selected; and the banking institutions selected shall remain depositaries until the next regular time for the selection of depositaries as provided by section 165.211, unless the order selecting the depositaries is revoked for the causes specified in sections 165.201 to 165.291.