The director may fix the rates of assessments or fees required by Section 62211 at lesser amounts, and may adjust the rates of assessments or fees from time to time, whenever he or she finds that the cost of administering the provisions of this chapter, including any allocation of funds made pursuant to Section 38986, can be defrayed from revenues derived from the lower rates. However, the rate of assessments deducted from payments to producers for market milk, including the handler’s own production, and the rate of fees paid by handlers shall, at all times, be in the ratio of 2 to 1, except that this ratio need not be achieved during a six-month period following the transfer of any fund surplus pursuant to Section 62574.