While local organizations may have certain 'home' rules, the following links will direct you the US Lacrosse sanctioned rules for Men/Women and Boys/Girls:

Men's Rules:  http://www.uslacrosse.org/the_sport/mens_rules.phtml

Women's Rules: http://www.uslacrosse.org/the_sport/womens_rules.phtml

Boy's Youth Rules: http://www.uslacrosse.org/the_sport/boys_rules.phtml

Girl's Youth Rules: http://www.uslacrosse.org/the_sport/girls_rules.phtml