Mandatory
Bouvier's Law Dictionary and Concise Encyclopedia · John Bouvier; revised by Francis Rawle · 1914
Bouvier's Law Dictionary and Concise Encyclopedia
In the construction of statutes, this word is applied to such as require to be obeyed, under penalty of having proceedings under them declared void. Directory statutes must be obeyed, but, if not, do not invalidate the act.
See Statute.