Section 5.03 - Letters of Advice(1)Letter.(a)Transmittal Letter. To avoid misunderstanding, tariffs or schedules should be accompanied by a letter of transmittal addressed to the Director of the Rates Division of the Department, showing the name of issuing party, individual number, and effective date. The Letter of Advice should be sent in duplicate, and one copy shall be stamped and returned to the sender to show the date of filing. Duplicates are not required for Letters of Advice filed pursuant to the Department's Electronic Filing Guidelines.(b)Letter of Explanation. All tariffs and schedules at time of filing shall be accompanied by a letter of explanation, which letter shall set forth in whatever detail is necessary the total amount of the increase or reduction in charges proposed by the new schedule and the effect by comparison with customers' charges under the existing rate schedule. The letter of explanation shall indicate the effect on the billings of the customers served under the various rate classifications affected. This letter of explanation shall be in addition to the letter of transmittal referred to in 220 CMR 5.03(1)(a).(2)Contracts. All contracts shall be accompanied by a letter containing the following information: (a) The justification of the necessity for a contract rather than billings under the filed rate schedule.(b) The estimated revenue differences as between billings under the proposed contract and the applicable rate schedule.(c) General comments on other special features or provisions of the contract such as: 1. Billing and payment date;3. Service and maintenance of any equipment or appliances;4. Length of contract and cancellation provisions;5. Any other pertinent information.Amended by Mass Register Issue 1315, eff. 6/17/2016.Amended by Mass Register Issue 1317, eff. 6/17/2016.Amended by Mass Register Issue 1347, eff. 9/8/2017.