mandatory
man-da-to-ry
adjective
Required by law or rules; compulsory and not optional.
"Wearing a helmet is mandatory on this construction site."
Thesaurus
Synonyms: mandate, compulsory, required, obligatory, mandatary
man-da-to-ry
Required by law or rules; compulsory and not optional.
"Wearing a helmet is mandatory on this construction site."
Synonyms: mandate, compulsory, required, obligatory, mandatary