prescribe
Meaning: to lay down a rule
Usage: The school rules prescribe that students must wear safety goggles in the lab.
proscribe
Meaning: to condemn, outlaw
Usage: The school voted to proscribe skateboards in the hallway.
edict
Meaning: an order, decree
Usage: The ruler issued an edict requiring all of his subjects to bow down before him.
injunction
Meaning: an official order requiring or forbidding an action
Usage: The court issued an injunction ordering the company to stop dumping waste into the river.
mandate
Meaning: an authoritative command
Usage: The new safety rule became a mandate for every laboratory in the school.
requisition
Meaning: a demand for goods, usually made by an authority
Usage: The lab manager submitted a requisition for new microscopes.