Final answer:
Each employee must request three-point protection when more than one employee requires it to perform duties simultaneously, and the specific requirements before moving depend on the company's policies and industry regulations.
Step-by-step explanation:
In a situation where more than one employee requires three-point protection to perform duties simultaneously, each employee must request three-point protection. The specific requirements before moving depend on the company's policies and industry regulations. However, in general, verbal or written permission from a superior or dispatcher is often necessary.
For option A, verbal permission from the conductor might be required in some situations, but this may vary. Option B states that written permission from the dispatcher is necessary, which is a more common requirement. Option C suggests that being within sight of each other is sufficient, but this is not true for all scenarios. Option D is incorrect because three-point protection is usually required when multiple employees need to perform duties simultaneously to ensure their safety.