The text below is from the OYLA (Oregon Youth Lacrosse Association) website:

 

The OYLA rule matrix below was written and approved by OYLA as exceptions to the NFHS Boys' Lacrosse Rules, as amended by the U.S. Lacrosse Youth Council. These OYLA rules, together with the NFHS Boys Lacrosse Rules as amended by the U.S. Lacrosse Youth Council, represent the full body of rules by which OYLA games will be governed. Rules not modified below are considered standard youth rules.