(a) is exempt from regulations 8 and 10; and
(b) is permitted to be marked with the expression “gross mass” or any other expression that has a similar meaning to that expression.
(2) This regulation applies to a package containing paper if—
(a) it was packed at the factory at which the paper was produced;
(b) it is packed in a quantity of more than 5 kg; or
(c) it contained at least 500 sheets and is marked with the number of sheets and the dimensions of each sheet.