Weighted deduction for export and agricultural development: indirect expenditure qualifies if properly apportioned and evidenced. Sections 35B and 35C allow a weighted deduction for qualifying export and agricultural development expenditure incurred directly or indirectly. Indirect expenditure by associations or export houses qualifies for members only if the expenditure falls within specified heads, non-qualifying expenditure is isolated, the net qualifying amount (after subsidy credit) is rationally apportioned and recovered from members, and proper accounts are maintained; for section 35C the association must be approved by the prescribed authority.