(1)  A package containing paper that is a package to which this regulation applies –

(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; or

(b) it is packed in a quantity of more than 5kg; or

(c) it contains at least 500 sheets and is marked with the number of sheets and the dimensions of each sheet.