73 Pa.C.S. § 3504: Certificate of commencement and of completion of municipal improvements.

(a) Certification.--The township engineer shall certify, to the township secretary, the date of commencement and date of completion of a municipal improvement that, in whole or in part, is to be paid by the owners of the abutting property. The certification shall be made a part of the permanent records of the township. The certified date of commencement and certified date of completion shall be conclusive on all parties.

(b) Definition.--As used in this section, the term "certified date of completion" means the date of the completion of the whole contract for a municipal improvement.