(1) As soon as possible after completing the computation of the quota and excess prices the administrator shall:

(a) compute the net pool obligation of each pool handler by subtracting from his utilization value the amount of money due pool dairymen from such pool handler, based on the quota and excess prices for milk as adjusted for the butterfat test thereof, and other charges as required or permitted under the rules of the Milk Control Bureau;

(b) on or before the 13th day of the month provide written notice to each pool handler of the price and butterfat differential for quota and excess milk for the preceding month, the pool handler's utilization value, and the minimum amount owed pool dairymen for pool milk received or marketed;

(c) on or before the 13th day of the month, notify each pool handler of the amount if any by which his utilization value for the preceding month exceeds the amount due pool dairymen with respect to the pool handler's pool milk, based on the appropriate quota and excess prices. The amount of such difference must then be paid by such pool handler to the administrator on or before the 15th day of the month, or the first business day thereafter, for deposit into the pool settlement reserve. Any amount due that is not received by the administrator by the 25th of the month will have a late charge or an interest charge of 1.5% automatically attached each month the payment is not made. For purposes of calculating the interest, the 1.5% charge will be added to the unpaid balance each month.

(d) pay to each pool handler on or before the 14th day of the month or as soon as funds are available, any sum by which the pool handler's utilization value for the preceding month is less than the amount due those from whom he received pool milk during the preceding month, based on the quota and excess prices as adjusted for the butterfat content of such pool milk.