(a) General rule.--A proceeding to open a sanitary sewer shall be void if a borough:
(1) lays out any sanitary sewer over or under private property which is located in whole or in part within the limits of the borough; and
(2) does not proceed to open the sanitary sewer and to assess the damage arising therefrom within two years from the enactment of the ordinance.
(b) Exception.--If a borough has laid out a sanitary sewer without the enactment of an ordinance prior to July 16, 2012, and has not opened the sanitary sewer, the proceedings shall not be deemed to be void. The borough shall have two years from July 16, 2012, to open the sanitary sewer or the whole proceeding shall be void.