Complex sentence: Those in need of the LFB's services in an emergency do not pay, but the brigade can provide additional special services for which it may charge where there is no immediate threat to life or imminent risk of injury.
Split into simpler sentences: Those in need of the LFB's services in an emergency do not pay. But the brigade can provide additional special services for which it may charge where there is no immediate threat to life or imminent risk of injury.