In this Chapter and in Schedule 4 -

"accounting period" means a period of 2 calendar months or such other period as the Commissioners may prescribe for the purposes of payment and returns under section 39;

"added sugar" means - (a) sugar, or (b) substances containing sugar, except for juices, that is or are combined with other ingredients in the production or manufacture of prepacked ready to consume sugar sweetened drinks or prepacked concentrated sugar sweetened drinks;

"calcium content" means the number of milligrams of calcium per 100 millilitres of sugar sweetened drink in ready to consume form;