Toset forth principles of behavior in formal documents is hardly to guarantee their observance.

正式文件中所提出的行为准则，并不能保证它们得到遵守。

youdao

One of the principles of international behavior is that our diplomats -- we send them around the world -- that they are going to be protected, they are not targets for threats or physical violence.

WHITEHOUSE: President Obama and President Lee Press Availability

The authors cannot be said to be ignorant of the existence of economic principles that govern human behavior, but a case can be made that they misunderstand them.

FORBES: Simple Economics Lessons for Two Historians