(1) All households shall have their eligibility and the amount of food stamps they are entitled to receive determined using prospective budgeting.
(2) Prospective budgeting means using the best estimate of income and other circumstances which will occur in a particular month to determine eligibility for that month and/or the amount of benefits for that month.
(3) Lease, royalty, and rental income which is received periodically but not on a monthly basis and which is expected to continue shall be determined based on the 12 month period immediately prior to the month of application. The projected income shall be prorated over the current 12 month period. Once a cycle of income proration is established, it shall remain in effect for one year. However, if any portion of the prior period's income is expected to stop in the current period, then this portion shall not be considered as income in the current period.