What type of registration must an applicant demonstrate is in good standing if they are a dentist?

The correct answer is federal registration, as it is essential for a dentist to demonstrate their compliance with federal regulations in order to maintain their practice. Federal registration is typically associated with the Drug Enforcement Administration (DEA), which oversees the prescribing and handling of controlled substances.

A dentist must possess a valid DEA registration to legally prescribe medications or substances that fall under the Controlled Substances Act. This ensures that dentists adhere to federal laws and regulations concerning medication safety and the prevention of drug abuse.

While state registration is also critical, as it pertains to licensure and practice within the respective state, the question specifically asks about the type of registration that must be demonstrated as being in good standing, which aligns with federal requirements for legal operation regarding controlled substances. Local and corporate registrations, while they may exist, do not directly impact the legal ability to practice dentistry or prescribe medications on a federal level.