75 Pa.C.S. § 3719: Passengers in open trucks.

(a) General rule.--An open-bed pickup truck or open flatbed truck may not be driven at a speed of more than 35 miles per hour if any person is occupying the bed of the truck.

(b) Children.--

(1) Such a truck may not be driven at any speed if a child less than 18 years of age is occupying the bed of the truck or trailer.

(2) This subsection shall not apply to:

(i) a child of a farmer who is being transported between parts of a farm or farms owned or operated by the farmer in order to perform work on the farm or farms;

(ii) a child possessing a valid hunting license who is being transported between a hunting camp and a hunting site or between hunting sites during hunting season;

(iii) a child who is a participant in an officially sanctioned parade, only during the course of the parade; or

(iv) a child employed to perform farm labor who is being transported between parts of a farm or farms owned or operated by the child's employer or employers.