2019 Rules Changes for Girls' Lacrosse 08/25/2018 There are some significant rules changes coming for Girls Lacrosse in 2019. For an overview of the changes from US Lacrosse and the National Federation of High Schools (NFHS), please follow these links: Click here for the NFHS rules changes Click here for the US Lacrosse rules changes Download 2019 US Lacrosse High School Rules Changes