S.37(1): Business expenditure – Capital or revenue-Preliminary drilling expenses incurred on account of fees, studies and other consultancy charges —Allowable as revenue expenditure – Office renovation-Dismantling wells, sand filling, Excavation, cementing, plastering, Etc. and sundry expenses 1Revenue expenditure 1Purchase of furniture and fixtures for new office 1Capital expenses-Depreciation is allowable-Expenditure on bifurcation of oil tank, construction of office shed, construction of slab and pipe culvert, construction of platform for tankers and foundation and towards demurrage charges for water injection plant 1Expenses primarily to bring into existence capital asset 1Not revenue-Entitled to depreciation-Expenditure on repairs and maintenance of leased premises 1Allowable as revenue expenditure. [S. 32]