(1) Prospective budgeting means that the agency shall compute the amount of assistance for a payment month based on its best estimate of income and circumstances which will exist in that month. This estimate shall be based on the agency's reasonable expectation and knowledge of current, past or future circumstances.

(2) Retrospective budgeting means that the agency shall compute the amount of assistance for a payment month based on actual income or circumstances which existed in a previous month, the “budget month”.

(3) Budget month means the fiscal or calendar month from which the agency shall use income or circumstances of the family to compute the amount of assistance.

(4) Payment month means the fiscal or calendar month for which an agency shall pay assistance. Payment is based upon income or circumstances in the budget month. In prospective budgeting, the budget month and the payment month are the same. In retrospective budgeting, the payment month follows the budget month and the payment month shall begin within 32 days after the end of the budget month.

(5) Make an assistance payment. In the context of retrospective budgeting, to make an assistance payment means that the check shall be deposited in the U.S. mail, hand delivered to the recipient, or deposited with an intermediary organization, such as a bank.

(6) Supplemental payment. In the context of retrospective budgeting, a supplemental payment is a payment which maintains a family during the time it takes for the monthly assistance payment to reflect a change in circumstances or income.