This is from ASA Rules Clarifications, June 2014:
Play: With no outs and R1 on 2B and R2 on 1B, B3 bunts the ball and is thrown out at 1B. R1 advances to 3B and R2 to 2B. After the first pitch to B4, F2 returns the ball to F1 removes her mask and glove and walks toward the pitcher’s circle at which time the plate umpire calls “time.” After that half inning ends the coach of the team that was on defense tells the umpire not to call time when their catcher removes their equipment and goes to the pitching circle. He informs the umpire that they had a trick play they use to draw the runners off their bases thus getting a runner called out for violation of the Look Back Rule.
Ruling: We do not specifically mention trick plays in the ASA/USA Rule Book or Umpire Manual. If all playing action is over and the pitcher has the ball in the eight foot circle, the runners are required to go one way or the other. That said we should teach umpires as part of Game Management that any time the catcher goes to the eight foot circle to talk to the pitcher “time” should be called as long as all play has ceased. In this case, this would be interpreted as the runners have returned to or are returning to their base. Umpires should call “time” as a courtesy for the catcher so that the one time the catcher forgets to request time they are covered by our mechanics. We should not let a mechanic that was started to protect the defense become a trick play. We will call time when the catcher vacates their position to go to the circle to protect them as well as the integrity of the game. Rule 8, Section 7T.