Where should the official line-to-gain equipment be positioned during play?

The official line-to-gain equipment is positioned on the visitor sideline, specifically 2 yards from the sideline. This placement allows for clear visibility and accessibility for officials and players during the game. By being 2 yards from the sideline, it ensures that the equipment does not interfere with the play and provides a consistent reference point for determining whether a team has achieved a first down.

Positioning the equipment on the visitors' sideline helps eliminate potential confusion, as players and coaches will know exactly where the line-to-gain equipment is located, allowing them to focus on the play without obstruction. Additionally, it is a standard practice that maintains a uniform setup across games, ensuring consistency in officiating.

The other options, such as the home sideline, center of the field, or behind the end zone, do not provide the same level of visibility, safety, or practicality for game management and would likely lead to complications in determining field position during play.