If you join the club, you should abide by the rules.
That's a good rule to go by.
Students are required to conform to the rules.
Our boss enjoined us to obey the rules.
It is important to drive in compliance with the traffic laws.
It is important that everybody keeps the rules.
The accident impressed on me the necessity of observing regulations.
Servants in the Royal Household are held to a strict code of protocol.
Professor instructed his students to obey the experimental rules.
The coach demanded abidance by the rules of the game.
In driving a car in the street , one has to comply with the traffic regulation.
Should Dilemma Observe the Rules of Disjunctive Syllogism;
You should obey the school rules.
Mr Toad does not obey the rule.
Everybody must obey the rules!
Request compliance with the rules, eg on a notice
All students must conform to the rules.
not adhering to ethical or moral principles.