The amount of a bookmaker's profits for an accounting period in respect of retained winnings on Chapter 2 pool bets is the aggregate of the amounts which cease to be qualifying amounts during the accounting period.

An amount is a qualifying amount for the purposes of this section if, as a result of a person (“P”) being notified as mentioned in section 149(2)(b), it has been taken into account in calculating the bookmaker's profits for any accounting period under section 145 or 146.

An amount ceases to be a qualifying amount for the purposes of this section if, otherwise than by virtue of being withdrawn by P as mentioned in section 149(2)(b), P ceases to be entitled to withdraw it.

The Commissioners may by notice published by them direct that subsection (3) is not to apply in a specified case or class of cases.