Within six months following receipt of funding, the local governmental entity operating the PSAP shall submit to the board all receipts documenting approved expenditures, in a single package. Immediately upon receipt of notice by the board of any unauthorized expenditure or undocumented funds, the entity operating the PSAP shall cease making unauthorized expenditures. Within 30 days following the board's final determination that any expenditure is unauthorized or is not sufficiently documented, the PSAP shall refund such amount.