Rule 24. All claims incurred and paid by the county social welfare board involving vendor medical service for which state reimbursement is sought must be submitted to the county bureau of social aid on a monthly basis but not later than the end of the fifth month following the month in which the latest continuous service in the same class is rendered. Provided, that the state department may pay a bill submitted beyond the fifth month if in its judgment there are extenuating circumstances and if federal financial participation can be obtained.
Mich. Admin. Code R. 400.24