Paragraph 10
(1)
The back of the ballot papers shall be in the form set out in the Appendix.
(2)
A ballot paper—
(a)
shall be capable of being folded up,
(b)
shall have a number printed on the back, and
(c)
shall have attached a counterfoil with the same number printed on it.
(3)
For the referendum in Scotland, the two forms of ballot paper shall be of different colours.