Spectrum fee expenditure rules define 'actually paid' and require recomputation if deferred payment conditions are breached. Expenditure for obtaining the right to use spectrum for telecommunication services is linked to the meaning of 'actually paid' under the specified tax provision. Full upfront payment covers the actual expenditure paid, while deferred payment covers the amount that would have been payable on an upfront basis, both according to the regular method of accounting. If deferred payment conditions are breached and spectrum allotment is terminated, the Assessing Officer must recompute income by deeming the amount paid up to termination as 'actually paid' and treating the spectrum as in force only up to termination.