Here is some more age requirement info for teams interested in attending the US Lacrosse Regional Championships

http://www.uslacrosse.org/TopNav2Right/Events/2012USLRegionalChampionships/AgeRequirement.aspx

A player may participate in more than one (1) Regional Championship as long as he/she meets the age requirements.

Age Requirement
All US Lacrosse youth events in 2012 will feature the age-appropriate, national playing rules for youth boys’ lacrosse and youth girls’ lacrosse to be adopted by the US Lacrosse Board of Directors at its Sept. 10-11, 2011, meeting. The board vote will conclude roughly a nine-month research, development and rules-writing process that included input nationally from youth lacrosse players, coaches, officials, administrators and parents and from the US Lacrosse Sports Science and Safety Committee. The new youth lacrosse rules will be published in various US Lacrosse media following the vote.

Proof of Age
All 2012 Regional Championship participants, in U11, U13, and U15 divisions, are required to submit to US Lacrosse a copy of a proof of age document in order to be eligible to participate in this event.

Acceptable proof of age documents:
• Birth Certificate
• Passport
• School ID (if date of birth is present on ID)

Proof of age documents should be faxed (410-889-0744) or e-mailed to Shannon Minter AFTER the parent/legal guardian completes a player medical waiver.