In these rules, unless the context otherwise requires, -
(a) "Act" means the Environment (Protection) Act, 1986 (29 of 1986);
(b) "area/zone" means all areas which fall in either of the four categories given in the Schedule annexed to these rules;
(c) "authority" means any authority or officer authorised by the Central Government, or as the case may be, the State Government in accordance with the laws in force and includes a District Magistrate, Police Commissioner, or any other officer designated for the maintenance of the ambient air quality standards in respect of noise under any law for the time being in force;
(d) "person" in relation to any factory or premises means a person or occupier or his agent, who has control over the affairs of the factory or premises;
(e) "State Government" in relation to a Union territory means the Administrator thereof appointed under article 239 of the Constitution.