11 Pa.C.S. § 11504
(a) Certification.— Within a reasonable time after the completion of any municipal improvement, the cost and expense of which, in whole or in part, is to be paid by the abutting property owner, the city engineer or employees designated by the city engineer shall:
(c) Definition.— As used in this section, the term "the day or time of the completion of the work" means the time of the completion of the whole contract for the improvement.
Cross References. Section 11504 is referred to in section 13002 of this title.