“(2) The remission rate applicable in respect of a prescribed lease is—
(a) in the case of a lease held by the Commissioner for Housing that was granted to the Commissioner for a term commencing on or before 16 December 1987—50 per cent of the added value of the lease; or
(b) in any other case—the rate, expressed as a percentage of the added value of the lease, specified in Column 2 of the appropriate table in Schedule 3 opposite the range of years specified in Column 1 of that table that includes the number of years that have elapsed since the grant of the lease.”.