Final answer:
Controllers guilty of drug or alcohol abuse are processed for separation according to national regulations, aiming for consistent policy application across states and local governments.
Step-by-step explanation:
Controllers guilty of drug/alcohol abuse shall be processed for separation in accordance with national regulations. National policies often prefer uniformity to ensure consistency across different states and local governments. National-level policies, such as those referenced by the Prevention and Treatment Act and the National Institute on Drug Abuse, provide frameworks that guide agencies on handling substance abuse issues, including the separation of individuals guilty of such abuse. These policies would apply to cases related to drug and alcohol abuse by professionals, including controllers.