A nation's or State's lawmakers, usually. In the USA, such a law can however be veto'ed by the President. And even if implemented, a decision on appeal can be given by the Supreme Court whether any such a law is too much of an infringement on anyone's Constitutional rights.
Thomas Paine
Ultimately, the Board of Directors decides how profits should be spent in a corporation.
The price and quality of a given product are some of the considerations that should govern your decision making as a consumer.
A philosopher.
The people.
Of course, a nation should have both because a nation will not have freedom if it doesn't have the ability to govern. The ability to govern is to make freedom for the nation and to make a nation independent.
management
The IEE regulation that govern the installations of generators is that they should have a power factor of 0.7.
The legislative branch (Congress) decides on what should be law and makes the laws.
Leaders should govern by delegating tasks to others. They then manage the results for the benefit of the governed. Leaders lead best when they remain in the background.
Duck should only eat what is found in their natural environment, unless an uniformed idoit decides to pop pocorn for the duck, then I guess a duck will eat popcorn.
You should run if a dog decides to chase you. If you can climb on to anything then you should try to do so. Scream for help and cover your face and neck if the dog catches you.