Mandatory
Part of speech: adjective
Definition: Obligatory; required or commanded by authority. Of, or relating to a mandate.
Example sentence: The other day they asked me about mandatory drug testing. I said I believed in drug testing a long time ago. All through the sixties I tested everything.
Mandate
Part of speech: noun
Definition: An official or authoritative command; an order or injunction; a commission; a judicial precept.
Part of speech: verb
Definition: to authorize
Example sentence: Nationalism and anti-nationalism is a matter of perception. You cannot mandate who is a nationalist and what is not.