Section 6

Section 6. And be it further enacted by the authority aforesaid, That it shall at all times be lawful for the mayor, aldermen and citizens of Philadelphia, aforesaid, to remove and abate any building, erection or obstruction whatever, which, by this act, or by any ordinance to be hereafter passed by virtue of it, may be declared a nuisance: Provided, That if such building, erection or obstruction shall have been in existence at the time of the passage of this act, or of such ordinance passed by virtue hereof, the mayor, aldermen and citizens aforesaid shall give at least three months notice of their intention to remove the same to the persons having the ownership, occupation or use thereof, or in case no such persons shall be known to them, then they shall affix a copy of such notice to and upon such building, erection, or obstruction, three months before proceeding to remove the same.