(a) For the purpose of the payment of assessments, either a calendar month or a 4-week accounting period shall be considered the reporting period; however, other accounting periods may be used when approved by the Board on an individual basis. Each collecting handler shall register his reporting period with the Board. All changes in reporting periods shall be requested in writing and subject to approval by the Board.

(b) Each producer shall pay the required assessment on his commercial eggs pursuant to § 1250.514 to the collecting handler designated in § 1250.516 on or before the date of final settlement between the producer and the collecting handler for the eggs received by the collecting handler during each reporting period.