53 Pa. Stat. § 16722
Any farmer, or person whose principal occupation is that of a farmer, being the lessee or occupant of a stall in any of the public market houses of the city of Philadelphia, or the occupant of a stand in any of the public streets of the said city, which may now or hereafter be made stands for market wagons, may lawfully sell at such stall or stand, in any quantity, any meat of a marketable quality slaughtered on his farm, without regard to whether the same be produced or fattened on his farm or elsewhere; and any such farmer who may now be, or hereafter become the lessee of any stall or stand, in any of the public market houses of the said city, shall be entitled to become the lessee of such stall or stand from year to year, and to continue to occupy the same in preference to any other person, so long as he may pay, within the proper time, the legal rent therefor, and company with all proper rules and regulations for the government of said market houses; any act of assembly, ordinance of the city councils, or requirement of the market department of the said city, to the contrary notwithstanding.
53 P.S. § 16722