Which of the following is enforceable by an Authority Having Jurisdiction (AHJ)?

The correct answer is codes, as they are legally enforceable regulations that govern construction, safety, and operational procedures within various jurisdictions. Codes are established by authorities to ensure the health, safety, and welfare of the public, and they carry binding legal weight. This means that compliance with the codes is required; individuals or organizations can be held accountable for violations and may face penalties or be required to make corrections.

Standards, while important for ensuring quality and safety, are typically voluntary unless they have been adopted by a code or a regulatory body. Guidelines and recommendations serve as best practices or suggestions for procedure but do not possess the force of law and are not enforceable by authorities.