Rule Against Ambiguity: This rule postulates that a charge must be clear enough as to give the defendant adequate notice of the offence with which he is charged. It should state The name of the defendant, date & place of commission of the offence, the name given to the offence by the law creating it and The section of the law under which the defendant will be punished and the law itself. . Generally, the court does not regard any omission or errors in the charge as material except the defendant was in fact misled by such error or omission. See S.147,148 ACJL, Lagos; S.194,378 ACJA
Rule against Duplicity; What this rule forbids is that no count shall contain more than one offence except in permitted circumstances dictated by a statute. A charge is therefore bad for duplicity if it contains more than one offence. S.209 ACJA, S.152 ACJL, Lagos. The Exceptions are; (a) where the offences relate to general deficiency of money committed over a period of time, (b) Adoption of the statutory forms (S.146 ACJL, Lagos; S.193,377 ACJA), (c) Offences defined in the alternative can be contained alternatively, in a single count.
Rule against Misjoinder of offender; This rule forbids joining offenders together in a cause or matter before the court. Thus, generally, only a defendant should be charged in the charge sheet, for the offence(s) committed by him. There are instances however in which it is permissible to join and try more than one defendant together; (a) When more persons than one are defendant of the same offence, they may be charged and tried together. See S.7,8,9 of the Criminal Code (b) When more than one person commits different offences in the course of the same transaction, they may be charged and tried together. (c) When a person is accused of committing an offence and another of abetting or being accessory to such offence.
Rule against misjoinder of offences: Generally, every distinct offence with which any person is accused shall be charged separately. There are exceptions to this rule, See S.209-215 ACJA; S.153 ACJL, Lagos.