(1) The value of a * taxable supply of * commercial accommodation that:
(a) is provided in * commercial residential premises that are not * predominantly for long-term accommodation; and
(b) is provided to an individual as * long-term accommodation;
is the sum of:
(c) the value, worked out in the way set out in section 9-75, of that part of the supply that relates to provision of the commercial accommodation during the first 27 days; and
(d) 50%, or such other percentage as is specified in the regulations, of what would be the * price (if this Division did not apply) of that part of the supply that relates to provision of the commercial accommodation after the first 27 days.
(2) This section has effect despite section 9-75 (which is about the value of taxable supplies).