Section 32(3)(d) in The Maharashtra Air (Prevention and Control of Pollution) Rules, 1983
(d)Every memorandum of appeal shall be submitted in quadruplicate and shall be presented to the appellate authority either by the appellant in person or by his authorised agent or sent to such authority by registered post. When the memorandum of appeal is presented by an agent duly authorised by the appellant, it shall be accompanied by a letter of authority written on a stamped paper of the value as required by law, appointing him as such agent.