( 1) Transmittal Letter. All proposed tariffs at time of filing shall be accompanied by a letter of transmittal addressed to the Department Secretary, showing the name of issuing party, individual tariff number, and effective date. The Transmittal Letter may be combined with the Letter of Explanation and should be sent in duplicate. One copy shall be stamped and returned to the sender to show the date of filing.

1. (2) Letter of Explanation. All proposed tariffs at time of filing shall be accompanied by a letter of explanation. The letter shall summarize the filing, including any revisions made, and shall include the specific tariff number and the specific pages and section numbers being filed for consideration.