2. In this Act, unless there is anything repugnant in the subject or context,-(a) “continental shelf” and “economic zone” have the same meaning as in the Territorial Waters and Maritime Zones Act, 1974 (XXVI of 1974); ¹[* * *](c) “petroleum” means-(i) any naturally occurring hydrocarbon, whether in a gaseous, liquid or solid state;(ii) any naturally occurring mixture of hydrocarbons, whether in a gaseous, liquid or solid state; or(iii) any naturally occurring mixture of a hydrocarbon or hydrocarbons, whether in a gaseous, liquid or solid state, and one or more of the following, that is to say, hydrogen sulphide, nitrogen, helium and carbondioxide;(d) “petroleum agreement” means a production sharing agreement or any other agreement or contract relating to any petroleum operation;(e) “petroleum operation” means any activity related to exploration, development, exploitation, production, processing, refining or marketing of petroleum.