10Where an election for the herd basis is made, every person carrying on any farming or other trade affected by the election shall, if required to do so by notice from the inspector, make and deliver to the inspector, within the time specified in the notice, such returns as to, and as to the products of, the animals or other creatures kept by him for the purposes of the trade as may be required by the notice.
11Where an election for the herd basis has effect for any chargeable period after an assessment for that period has become final and conclusive, any such assessment or, on a claim therefor, repayment of tax shall be made as may be necessary to give effect to the election.
12The validity of an election for the herd basis in force immediately before the commencement of this Schedule and made in pursuance of—
(a)section 35 of the Finance [1973 c. 51.] Act 1973 on or after 25th July 1973 and before 6th April 1976, or
(b)section 48(6) to (9) of the [1984 c. 43.] Finance Act 1984,
shall not be affected by the repeal of those sections by this Act.