Employing Caretakers

Question, who employs a caretaker to manage a building. Is it the owner’s executive commitee, the owner’s corporation, or the specific strata management agency of that building. And are wages paid to a care taker via  quarterly  admin fees, or by levies?

Just confused about who caretakers/building managers, in a building are actually employed by! Do caretakers have the ability to make, or enact By-laws or is that the owner executive commitee. I have always wondered who a building manager/caretaker reports to and is there Boss, and some of the basic authority they have in a building they help with the operating off.