I'm not sure if the rules are different in high school, but I believe a deputy is allowed generally. Here is US Lacrosse's rules:
Section 17. The deputy:
a. may only enter or remain in the goal circle when her team has possession of the
ball.
b. must immediately leave the goal circle when her team loses possession of the ball.
c. may go into the goal circle to prevent a rolling ball from crossing the goal line.
d. while within the goal circle must clear the ball within ten seconds after it has
entered the goal circle.
e. while within the goal circle may play the ball with her hand, place it in her crosse,
and proceed with the game.
http://www.uslacrosse.org/LinkClick.aspx?fileticket=ksr1gqtsWTs%3d&tabid=2459Hope this helps!
