53 Pa. Stat. § 22230
Every legislative act of the council shall be by resolution or ordinance, and every ordinance or resolution, except as hereinafter provided, shall, before it takes effect, be presented, duly engrossed and certified, to the mayor, for his approval. The mayor shall sign the said resolution or ordinance within ten days, if he approves it; but if he shall not approve it, he shall within said time return it, with his objection, to council, which shall, at its next meeting after said return, consider it. If, upon reconsideration, council shall pass the ordinance or resolution over the veto of the mayor, by a two-thirds vote of all the members thereof, it shall be a binding ordinance or resolution of the city. It shall become effective should the mayor fail to sign the said ordinance or resolution, or return the same to council, with his reasons for disapproving the same, within ten days from the time said ordinance or resolution has been delivered to him by the city clerk. The mayor may disapprove any item or items (or part, or parts, of the same) of any bill making appropriations; and the part or parts of the bill approved shall be the law; and the part or parts disapproved shall be void, unless repassed according to the rules and limitations prescribed above for the passage of resolutions and ordinances over the mayor's veto.
53 P.S. § 22230