Are officers, DEA agents, or FDA agents engaged in the enforcement of federal law relating to controlled substances required to register with controlled substances?

Officers, DEA agents, and FDA agents engaged in the enforcement of federal law relating to controlled substances are not required to register with the controlled substances registry. This is because their activities fall under their official duties as law enforcement officials mandated by federal law to enforce regulations related to controlled substances. These agents are exempt from registration due to the nature of their roles, which involve investigating and enforcing policies related to the controlled substances themselves.

The other options imply conditions where registration might be necessary, but that contradicts the established understanding that law enforcement officials acting in their official capacity do not need to register. This exemption is designed to ensure that these authorities can effectively perform their enforcement duties without bureaucratic delays. Understanding this aspect of the law is crucial for anyone studying the regulations surrounding controlled substances and the roles of enforcement agencies.