Section 18 Effect of company starting or ceasing to be within charge to income tax

(1) This section applies if a company starts or ceases to be within the charge to income tax under this Chapter in respect of a trade.

(2) The company is treated for the purposes of this Part—

(a) as starting to carry on the trade when it starts to be within the charge, or

(b) as permanently ceasing to carry on the trade when it ceases to be within the charge.