decree
noun
1 an emergency presidential decree:
order, edict, command, commandment, mandate, proclamation, dictum, fiat, promulgation, precept;
law, statute, act, bill, ordinance, regulation, rule, injunction, enactment, manifesto;
in Tsarist Russia ukase;
in Spanish-speaking countries pronunciamento;
rare firman, decretal, irade, rescript.
decree Oxford Dictionary of English