53 Pa. Stat. § 16396
No plan for survey or regulation, or a revision of either or both, shall be finally acted upon by the said board of surveyors until advertisement shall have been made for two times in each of three daily newspapers of general circulation in the city of Philadelphia. The first insertion in each newspaper to be inserted at least fifteen days immediately preceding the proposed action, and the second notice to be inserted not less than five days thereafter, and that handbills be posted upon and throughout the area covered by the plan to be considered, giving notice of a hearing thereof for at least fifteen days prior to said hearing; and that upon the confirmation of any plan of surveys and regulations by the said board of surveyors, the seal of the board shall be affixed thereto and attested by the presiding officer; said confirmation to be final and conclusive without appeal.
53 P.S. § 16396