[ASA Co-Ed SP] Baseline?

[Stat-Man]

There was one thing I forgot to mention about last week's SP game.

There was a situation that happened to each team where the umpire called out a player on each team for running out of the baseline. When it happened against our team, our player-manager asked the umprie who responded by saying that the base is 18 inches wide and the baseline extends 3 feet on either side.

Granted, I know very little about ASA rules for now, but I was under the impression a player was only out for being out of the baseline if they went more than 3 feet away from a fielder trying to put them out -- or is that just NFHS?