What must alternative methods to labeling stationary containers do?

The correct choice emphasizes that alternative methods to labeling stationary containers must identify the container and effectively convey the required information. This is essential for ensuring that everyone who interacts with the chemical, including employees and emergency responders, understands the nature of the hazard and how to handle it safely. The information conveyed typically includes the identity of the chemical, hazard warnings, and any precautionary measures that should be taken.

In scenarios where traditional labeling might not be practical, such as larger stationary containers, alternative methods must still fulfill the purpose of informing individuals about the contents and associated risks. This aligns with OSHA's Hazard Communication Standard, which aims to ensure that hazards are communicated clearly to protect workers.

The other options, while they may have some relevance in different contexts, do not capture the core requirement for alternative labeling methods as effectively. Limiting access to authorized personnel focuses on security rather than communication, including only composition details overlooks critical hazard information, and suggesting that approval by OSHA is required does not accurately reflect the expectations for alternative methods. The emphasis remains on clear identification and the dissemination of comprehensive hazard information in any form of labeling.