Yes. Here's the language from the pa statute:
The department shall register trucks, truck tractors and trailers at the gross weight requested by the applicant, provided that the weight is not greater than allowed in subsection (d) or less than allowed in subsection (e).
(e) Minimum registered gross weight.--No truck, truck tractor or trailer shall be registered at less than the total of the weight of the unladen vehicle, the maximum weight of the proposed load, the equivalent weight of the fuel capacity, 150 pounds times the seating capacity, and the weight of any permanently or temporarily attached appurtenances.
https://www.legis.state.pa.us/WU01/LI/LI/CT/HTM/75/00.013.004.000..HTM
Just don't get caught over 26000-you'd have both a license and a registration violation, a world of problems.