in principle invalid and unenforceable, because it affects a person’s right to freedom of person.

in principle valid and enforceable, because the law permits the restraint of a person's freedom to trade if the parties freely conclude an agreement to this effect.

in principle valid but unenforceable, because parties may conclude a valid contract, but it does not mean that it will be in the best interests of the parties.

in principle invalid and enforceable as it pertains to their Constitutional rights to freedom of trade.