A municipal corporation which owns and operates or owns a sewage treatment plant is eligible to apply for a grant. An application for a grant is to be made for each sewage treatment plant. Eligible works, including but not limited to outlet sewers, overflow structures and diversion chambers, on the sewerage system contributing flow to such plant must be included in the application. Pumping stations which have replaced a municipally owned sewage treatment plant are eligible for reimbursement for municipalities whose fiscal year begins on or after June 1, 1982.