52 Pa. Code § 23.51 – Tariff files kept by carriers at principal office.

(a) If the principal office of a carrier is located within this Commonwealth, the carrier shall provide and maintain at its principal office and at Philadelphia and Pittsburgh, if its lines reach those cities, a complete file of the tariffs which it issues or to which it is a party. Such files shall be in charge of an employe or agent of the carrier who shall give desired information and assistance to those who may wish to consult the file, which shall be open and accessible to the public on ordinary business days and during ordinary business hours. If the principal office of a carrier is not within this Commonwealth, it shall designate some one place in this Commonwealth, to be approved by the Commission, at which a complete file shall be kept.
(b) A notice, not smaller than 8 by 10 inches and printed in large type shall be provided by each carrier and kept posted in a conspicuous place in the principal office, or the above-mentioned designated office, of the carrier. The notice shall read:
COMPANY
A COMPLETE PUBLIC FILE OF THE TARIFFS OF THE ABOVE-NAMED CARRIER IS MAINTAINED IN THIS OFFICE, AND MAY BE INSPECTED BY ANY PERSON UPON REQUEST, AND WITHOUT THE ASSIGNMENT OF ANY REASON FOR SUCH REQUEST. A REPRESENTATIVE OF THE COMPANY WILL LEND ANY ASSISTANCE IN SECURING INFORMATION FROM SUCH TARIFFS.