52 Pa. Code § 53.43
It is the duty of each public utility, with respect to each office operated by the utility at which the utility accepts payment for service, to do all of the following:
(4) To keep posted in the office, in a conspicuous place, a notice, printed in large type on a sheet not less than 8 by 10 inches in size, which reads as follows:
COMPANY
A FILE OF THE RULES, REGULATIONS, AND RATE SCHEDULES APPLICABLE TO SERVICE IN THIS LOCALITY IS MAINTAINED IN THIS OFFICE, AND MAY BE INSPECTED UPON REQUEST, WITHOUT ASSIGNING A REASON THEREFOR. THE REPRESENTATIVE AT THIS OFFICE WILL LEND ANY ASSISTANCE REQUIRED IN SECURING INFORMATION CONCERNING THE RULES, REGULATIONS, OR RATES OF THE COMPANY. A COMPLETE FILE OF ALL RULES, REGULATIONS, AND RATE SCHEDULES OF THE COMPANY IS MAINTAINED AT IN THE CITY OF AND MAY BE INSPECTED UPON REQUEST, WITHOUT ASSIGNING A REASON THEREFOR.
This section cited in 52 Pa. Code § 53.45 (relating to notice of new tariffs and tariff changes); 52 Pa. Code § 53.68 (relating to notice requirements); 52 Pa. Code § 53.94 (relating to posting of tariffs); and 52 Pa. Code § 54.98 (relating to customer notice requirements).