Which of the following is a requirement for the posting of No-Lone Zone signs?

The requirement for posting No-Lone Zone signs involves ensuring they are placed in high-security areas. This is crucial because No-Lone Zone signs are designed to alert individuals about zones where working alone poses increased risks, necessitating the presence of an escort or partner for safety purposes. By situating these signs specifically in high-security areas, organizations can effectively communicate to individuals in those zones the importance of adhering to safety protocols to prevent accidents or emergency situations, thereby promoting a culture of safety in critical environments.

Other potential considerations, such as visibility from a distance, contact information for security personnel, or limitations to training exercises, do not capture the primary purpose of these signs in fostering safety and collaboration in zones where there might be higher risks associated with working alone.