11For the purposes of this Schedule, and of section three of this Act—
(a)all sheets or strips of unexposed sensitised film which are of a length not less than twelve feet shall, whatever their width, be treated as cinematograph film;
(b)references to exposed cinematograph film shall include references to all such film whether it is positive or negative, whether it is developed or undeveloped and whether or not it contains or consists of sound track;
(c)two lengths of exposed cinematograph film representing the same objects shall not be deemed not to be duplicates of each other by reason that one is positive and the other is negative, or by reason that the objects are represented on different scales and the dimensions of the lengths of film are correspondingly different, or where both lengths are intended for use in the production of a coloured picture, by reason of any differences ascribable to the nature of the processes involved in producing such a picture.