Definition of agricultural income clarified, including land, cultivation proceeds and proximate building use for tax treatment. Definitions central to income-tax law are specified: advance tax; agricultural income including rent, cultivation proceeds and related building use subject to occupancy and municipal-distance criteria; amalgamation requiring vesting of property and liabilities and shareholder continuity; assessee encompassing assessed and deemed persons; block of assets, approved funds, annual value and books of account including digital forms; capital asset with stated exclusions; and charitable purpose with a proviso limiting commercial activities unless ancillary and within a receipts threshold.