Final answer:
An officer may proceed with Code Red without obtaining supervisory approval or permission in situations where there is an immediate and serious threat to life or public safety that requires immediate action.
Step-by-step explanation:
An officer may proceed with Code Red without obtaining supervisory approval or permission in situations where there is an immediate and serious threat to life or public safety that requires immediate action. Examples of such situations can include an active shooter situation, a hostage situation, or a terrorist attack. In such cases, the officer must make a split-second decision to act in order to protect themselves or others.