英和和英

to observe a rule―act upon a rule comply with the regulations

to act upon a rule―comply with the regulations

the act of following a rule

an established rule

obeying the rules

express as a formula

the quality of conforming to law

according to statute

the quality of strictly conforming to law

cause to conform to standard or norm

the act of following a certain model

the law of diminishing returns

You should conform to the rules.

You have to follow the rules.

in accordance with the law

to obey the laws of the land

the law of cause and effect―causation―causality