The boss issued a directive about not using the fax machine.
directivenoun[C]
us/dəˈrek·tɪv, dɑɪ-/
an official instruction or order:
A federal directive forbids fund-raising in government offices.
directivenoun[C]
uk/dɪˈrektɪv/us
an official order or instruction:
the latest European directive on working hours
a directive to do sthUnder a directive to cut utility costs, one office building has installed skylights in conference rooms to reduce the need for artificial light.
The new e-commerce directive should lay out better guidelines about when exactly an online contract is formed.