4. After regulation 102(4) add—
“(5) Any approval given or direction made under this regulation shall only have effect if it is in writing in the form of a document which identifies itself as being such an approval or direction.
(6) Where a taxable person who is using a method which has been approved or directed under this regulation incurs input tax of the description in paragraph (7) below, that input tax shall be attributed to taxable supplies to the extent that the goods or services are used or to be used in making taxable supplies expressed as a proportion of the whole use or intended use.
(7) The input tax referred to in paragraph (6) above is input tax—
(a)the attribution of which to taxable supplies is not prescribed in whole or in part by the method referred to in paragraph (6) above, and
(b)which does not fall to be attributed to taxable or other supplies as specified under regulations 103, 103A or 103B.
(8) Where the input tax specified in paragraph (7)(a) above is input tax the attribution of which to taxable supplies is only in part not prescribed by the method, only that part the attribution of which is not so prescribed shall fall within that paragraph.”.