According to ASTM requirements, what must all gates do?

The correct answer is that all gates must be self-latching, according to ASTM requirements. Self-latching gates provide a critical safety mechanism, particularly in environments where they restrict access to potentially hazardous areas, such as those around amusement rides or attractions like the Skycoaster.

By being self-latching, these gates ensure that once closed, they remain secure without requiring manual intervention each time. This feature helps prevent unauthorized access and reduces the risk of accidents. If the gates required constant manual operation or were designed to remain open, it would compromise safety protocols by allowing individuals to enter restricted zones inadvertently. Additionally, self-latching mechanisms also minimize the possibility of human error, which is crucial in high-risk areas where the safety of patrons and operators is paramount.