The official mark
This section has no associated Explanatory Memorandum
20.—(1) Every ballot paper must contain an appropriate security marking (the official mark).
(2) The official mark must be kept secret, and an interval of not less than five years shall intervene between the use of the same official mark at an election (of whatever description) for the same county, county borough, district or London borough, as the case may be.
(3) The returning officer may use a different official mark for different purposes at the same election.