(a) In no case shall the Division pay, for the services received, more than was expended, exclusive of state and federal aid, by the political subdivision or organization operating the library.
(b) If in any year the state appropriations to the Division for services under this chapter are not sufficient to meet the cost of approved contracts for services or state appropriations exceed the formula designated in § 6602(b) of this title, the Division shall prorate the available funds in such manner so that each public library or public library system shall receive its proportionate share.
(c) In the event that no moneys are appropriated for the purpose of this chapter in any year, no public library or public library system shall have any claim to any other moneys appropriated to the Division.