Gross Annual Value calculation: vacancy adjustment reduces taxable house property value under applicable law provision.
Annual Lettable Value is the higher of Municipal Value or Fair Rent but capped by Standard Rent, fixed here at 80,000. Annual receipts excluding unrealised rent are 54,000. Deducting vacancy loss of 18,000 from the Annual Lettable Value produces a Gross Annual Value of 62,000 as the taxable base for house property income.

Gross Annual Value under Section 23 caps assessed value at standard rent; vacancy adjustment affects the GAV calculation.
Gross Annual Value under Section 23 applies the higher of municipal value or fair rent but not exceeding standard rent (63,000) as the Actual Lettable Value; after excluding unrealised rent and adjusting for vacancy, the Annual Rent Receivable is 42,000, taken as the Gross Annual Value under the cited provision.

Gross Annual Value rule: ALV equals the higher of municipal value or fair rent but capped at standard rent.
Annual Letting Value (ALV) is the higher of municipal value and fair rent but capped at the standard rent; with municipal value 60,000, fair rent 68,000 and standard rent 62,000 the ALV (and Gross Annual Value under the cited clause) is 62,000. Annual rent received excluding unrealised rent is 60,000, which is recorded separately from the statutory ALV used to determine Gross Annual Value.

Gross Annual Value rule for house property: higher of municipal or fair rent subject to standard rent cap.
Determination of Gross Annual Value requires taking the higher of municipal value or fair rent as the annual lettable value, provided it does not exceed the standard rent; the Gross Annual Value is then the greater of this lettable value and the actual annual rent received excluding unrealised rent.