OSHA's requirements for confined space entry are designed to protect employees from the hazards associated with entering and working in confined spaces. Here are the key requirements:

1. Permit-Required Confined Spaces: Employers must identify and evaluate the hazards of permit spaces before employees enter them. A permit space program must be developed and implemented, which includes measures to prevent unauthorized entry, specifying acceptable entry conditions, and providing necessary equipment for safe entry and rescue [1].

2. Entry Permit: Before entry, a permit must be issued that includes details such as the purpose of entry, the hazards present, and the measures taken to ensure safety. The permit must be signed by an entry supervisor and be available to all entrants [1].

3. Atmospheric Testing: The atmosphere within the space must be tested for oxygen content, flammable gases, and potential toxic air contaminants. Continuous monitoring may be required to ensure safe conditions are maintained [2].

4. Training: Employees must be trained to understand the hazards of confined spaces, the use of protective equipment, and emergency procedures. Training records must be maintained [1].

5. Rescue and Emergency Services: Employers must have procedures for summoning rescue and emergency services and ensure that rescue equipment is available and personnel are trained in its use [1].

6. Communication: Effective communication must be maintained between entrants and attendants to monitor the status of entrants and to alert them of the need to evacuate if necessary [1].

7. Ventilation: If a hazardous atmosphere is detected, the space must be ventilated to eliminate the hazard before entry. Continuous ventilation may be required to maintain safe conditions [2].

These requirements are part of OSHA's broader effort to ensure workplace safety and prevent accidents in confined spaces. Employers must comply with these regulations to protect their workers effectively.