The NOCSAE, the National Operating Committee on Standards for Athletic Equipment, who set standards for athletic equipment have updated the standards on both Boys’ and Girls’ Lacrosse balls that are used for play. More information can be found on this on the USLacrosse website.
USL/NFHS Boys’ Rulebook – Rule 1, Section 5
The ball shall be white, yellow, orange or lime green and meet the current NOCSAE lacrosse ball standard. White balls shall be used unless both coaches agree prior to or during the game to use a yellow, orange or lime green ball. Game balls shall be supplied by the home team.
NOTE: Beginning in 2014, all game balls must include labeling which states: “Meets NOCSAE Standard”.
USL Girls’ Rulebook – Rule 2-5
Beginning January 1, 2014, all balls must specify that the ball meets the NOCSAE standard.The text on the ball must state “Meets NOCSAE Standard” and the text must be in a typeface that is readable at 18 inches by a person with 20/20 vision.
NOCSAE Ball Mandate on USLacrosse.org – http://www.uslacrosse.org/about-the-sport/health-safety/equipment/nocsae-ball-mandate.aspx