The amount of any bond or other security required under § 22-239 shall be at least equal to the average monthly value of the total amount of milk so received or purchased by such dealer during the twelve-month period preceding the filing of the bond or other security and shall be filed within ten days after notice from the commissioner of the requirement. In any case in which the dealer did not receive or purchase milk from producers during at least six months of the year preceding such requirement, the commissioner shall determine the amount of the bond or other security based on current receipts or purchases. The amount of the bond or other security so required may be revised within six months after the filing thereof.