How are refrigerants affected by the regulations of Section 609?

The regulations of Section 609 specifically require that sales of certain refrigerants be limited to individuals who hold the appropriate certification. This measure is in place to ensure that only trained and knowledgeable technicians handle refrigerants, which are chemicals that can be harmful to both health and the environment if mishandled. By mandating certification, the law helps ensure that technicians are aware of the proper handling, recovery, and recycling techniques that adhere to environmental standards, thus minimizing the risk of pollution and harm.

In contrast, the other options do not accurately reflect the restrictions imposed by Section 609. While some refrigerants may have varying levels of restriction, it is not accurate to say that all are unrestricted or that only certain types are restricted without mentioning certification requirements. Additionally, new refrigerants are not simply permitted to be used without certification; the certification is crucial to ensure safe practices are followed. Hence, the requirement for technicians to be certified before purchasing refrigerants emphasizes safety and environmental protection.