Final answer:
An authorized entrant must alert the attendant if they encounter a prohibited condition in the permit space or recognize a warning sign or symptom of exposure to a hazardous condition.
Step-by-step explanation:
An authorized entrant must alert the attendant whenever one of the two occurrences is true: the authorized entrant encounters any condition in the permit space not allowed by the entry permit, or the authorized entrant recognizes any warning sign or symptom of exposure to a hazardous condition or operation in the permit space. It is crucial for the authorized entrant to immediately notify the attendant in order to ensure their safety and the safety of others.