Allowance taxation: guidance treats certain pilot allowances as taxable remuneration while preserving limited tax-exempt allowances and evidence-based exceptions. Special travelling allowance is treated as taxable remuneration in full; stay-over, meal and light refreshment allowances remain tax-exempt. Kit maintenance allowance is exempt only to the extent it reasonably represents expenditure incurred for duties, with the excess taxable. Reimbursement of insurance premia for loss of licence is a taxable perquisite. Other allowances and benefits meeting statutory exemption conditions remain non-taxable. Assessing Officers may accept evidence to allow greater exemption where justified. The guidelines apply to commanders and other pilots and to Air India pilots, and affect pending and future assessments but do not require reopening completed assessments.