12. (1) Every complaint must be made in writing and, if the issue of a warrant is required, must be supported by oath.
(2) A single complaint may charge several offences; each offence charged must be set out in a separate count.
(3) Any person may make a complaint unless the law constituting the offence requires a special authorization.
(4) When an offence is continuous, such continuation shall constitute a separate offence day by day.
(5) When a defendant is liable to separate penalties according to whether the offence is a first or a subsequent one, the complaint must mention for which offence other than the first proceedings are instituted. It shall be incumbent upon the complainant to prove a previous conviction.