Mandatory Statute Law and Legal Definition

Mandatory statute is a statute that requires a course of action as opposed to merely permitting it. It is a statute which leaves nothing to the discretion of the court in respect of compliance with its terms. Mandatory statute relates to matters of substance, affects substantial rights, and is of the very essence of the thing required to be done.

A mandatory provision in a statute is one which if not followed renders the proceeding to which it relates illegal and void.