Final answer:
A situation that requires immediate contact with local regulatory authority is when there is uncertainty over a serious fire or hazard after an alarm, indicating potential extreme physical danger, to ensure prompt response and appropriate action.
Step-by-step explanation:
A situation that requires local regulatory authority to be contacted immediately is when there is uncertainty over whether a serious fire or hazard awaits after an alarm, potential for extreme physical danger.
In such situations, it is crucial to contact the local regulatory authority, such as the fire department or emergency services, to ensure immediate response and appropriate action.
This is important to prevent harm, protect lives, and mitigate any potential damage or risks.