52 Pa. Code § 39.6 – Charge for services by property brokers.

(a) A property broker shall maintain and keep open for public inspection, at a place of business which he maintains, a schedule stating his maximum charge for a brokerage service which he holds out to perform.
(b) No broker may charge or collect more for a brokerage service than his maximum charge therefor as contained in his schedules maintained under subsection (a).