Under which four (4) conditions are restraints of trade legally enforceable?

I believe the restraints of trade that are legally enforceable are Government-Granted Monopolies, Private Franchises, Zoning Regulations and Environmental and Safety Regulations. But I am not 100% those are correct. Any help would be wonderful. Thank you.

Restraints of trade refer to contractual provisions that restrict a person or business from engaging in certain activities or professions. The enforceability of restraints of trade may vary depending on jurisdiction and specific circumstances. However, there are generally four conditions under which restraints of trade can be considered legally enforceable:

1. Reasonable Protection: For a restraint of trade to be legally enforceable, it should be designed to protect a legitimate business interest. This can include safeguarding trade secrets, confidential information, customer relationships, goodwill, or investment in specialized training.

2. Limited in Scope: The restraint should be of a specific duration and geographic scope, reasonable enough to protect the legitimate business interest but not overly restrictive. Courts typically assess the reasonableness based on the specific circumstances and the nature of the business involved.

3. Consideration: Restraints of trade, like any other contract, need to be supported by consideration. This means both parties involved must receive some value or benefit in exchange for agreeing to the restraint. The consideration can be in the form of money, employment, access to information, or other tangible or intangible benefits.

4. Public Interest: The restraint should not be contrary to public policy or against the public interest. If a restraint of trade is found to be excessively harmful to competition, unfair to consumers, or in any way detrimental to public welfare, it may be deemed unenforceable.

It's important to note that the specific conditions for enforceability may vary depending on the jurisdiction or legal system applied. Therefore, it's always recommended to consult with legal professionals or refer to specific laws and regulations in your relevant jurisdiction for accurate and up-to-date information.