give me 3 safety reminders for confined space

Here are three safety reminders for confined space entry:

1. Hazard Assessment and Control: Before any entry, a competent person must identify and assess all potential hazards within the confined space [1]. Implement control measures in order of priority: elimination, substitution, engineering controls, administrative measures, and PPE [2].
2. Entry Permit System: Never enter a confined space without a valid entry permit [3]. The permit must list entrants, location, valid time, and consider the work being done and code of practice requirements [3].
3. Emergency Preparedness: Ensure an effective rescue plan is in place before entry [4]. This includes having a trained attendant, readily available rescue equipment, and clear emergency procedures, including immediate evacuation protocols 1, 18.