What modification is permitted for a remote control operator's vest?

The appropriate modification that is typically permitted for a remote control operator's vest involves adding reflective patches. Reflective patches enhance visibility, especially in low-light conditions, improving the overall safety of the operator. Increasing visibility is crucial in environments where operations may be conducted remotely, as it allows for better monitoring and safety awareness.

In contrast, altering the structural integrity of the vest by bending the metal support bar, changing the color scheme, or removing protective layers compromises the safety features and design intended for the vest. These aspects are crucial for protection and effectiveness during operations, and any modifications that interfere with these features would not be permitted.