Section 2. Definitions

2. Definitions.— (1) In this Act, unless the context otherwise requires, — (a) "Advisory Board" means the Advisory Board constituted under section 4; (b)[3] ["appellate authority"] means the appellate authority appointed under section 16; (c) "building" means a house, outhouse, stable, latrine, urinal, shed, hut or wall or any other structure or erection, whether of masonry bricks, wood, mud, metal or any other material or any part of a building, but does not include a plant or machinery installed in a building or any part thereof or any portable shelter; (d) "commissioner" means a commissioner of metro railway appointed under section 27; 4 [(e) "competent authority" means the competent authority appointed under section 16;] (f) "development" with its grammatical variations means the carrying out of building, engineering, mining or other operations in, on, over or under land or the making of any material change in any building or land or planting of any tree on land and includes redevelopment; (g) "land" includes any right or interest in land; (h) "metro alignment", in relation to any[5] [metropolitan city, metropolitan area and the National Capital Region] means such alignment of the metro railway as is specified in the Schedule under that city and includes the metro railway; 6[(ha) "metropolitan area" shall have the meaning assigned to it in clause (c) of article 243P of the Constitution;]