(a) Power to withdraw.--When an authority has been incorporated by two or more municipalities, any one or more of such municipalities may withdraw from it, but no municipality shall be permitted to withdraw from an authority after an obligation has been incurred by that authority.

(b) Power to join.--When an authority has been incorporated by one or more municipalities, a municipality not having joined in the original incorporation may subsequently join in the authority.

(c) Procedure.--Any municipality wishing to withdraw from or to become a member of an existing authority shall signify its desire by resolution or ordinance. If the authority shall by resolution express its consent to such withdrawal or joining, the municipal authorities of the withdrawing or joining municipality shall cause a notice of its resolution or ordinance to be published at least one time in the legal periodical of the county or counties in which the authority is organized and at least one time in a newspaper published and in general circulation in such county or counties. This notice shall contain a brief statement of the substance of the resolution or ordinance, making reference to this chapter, and shall state that on a day certain, not less than three days after publication of the notice, an application to withdraw from or to become a member of the authority, as the case may be, will be filed with the Secretary of the Commonwealth.

(d) Filing an application to withdraw or join.--On or before the day specified in the notice, the municipal authorities shall file an application with the Secretary of the Commonwealth together with proof of publication of the notice required under subsection (c). In the case of a municipality seeking to become a member of the authority, the application shall set forth all of the information required in the case of original incorporation insofar as it applies to the incoming municipality, including the name and address and term of office of the first member or members of the board of the authority from the incoming municipality and, if there is to be a reapportionment of representation or revision of the terms of office of the members of the board, the names, addresses and terms of office of all the members of the board as so reapportioned or revised. The application in all cases shall be executed by the proper officers of the withdrawing or incoming municipality under its municipal seal and shall be joined in by the proper officers of the governing body of the authority and, in the case of a municipality seeking to become a member of the authority, also by the proper officers of each of the municipalities that are then members of the authority pursuant to resolutions by the municipal authorities of the participating municipalities.

(e) Certification of withdrawal or joinder.--If the Secretary of the Commonwealth finds that the application conforms to law, he shall, but not prior to the day specified in the notice, endorse his approval of it and, when all proper fees and charges have been paid, shall file the same and issue a certificate of withdrawal or a certificate of joinder, as the case may be, to which shall be attached a copy of the approved application. The withdrawal or joining shall become effective upon the issuing of the certificate.

Cross References. Section 5604 is referred to in section 5610 of this title.