strictrequirement

noun
UK /ˌstrɪkt rɪˈkwaɪəmənt/
US /ˌstrɪkt rɪˈkwaɪərmənt/

A rule you must follow with no exceptions.

Wearing a helmet is a strict requirement at the bike park.


OTHER MEANINGS

2. A condition that must be met exactly before something is allowed.

Passing the safety test is a strict requirement for joining the club.

3. A firm demand that cannot be changed or ignored.

The teacher made it a strict requirement to hand in homework on time.

4. A necessary thing that has no substitutes or alternatives.

For this job, speaking two languages is a strict requirement.