Pat,
All of the suggestions given above are good. You might want to contact the below as they will be able to direct you to the appropriate local association.
New Jersey State Interscholastic Athletic Association
Route 130
P O Box 487
Robbinsville, NJ 08691-1104
ph: (609) 259-2776
fax: (609) 259-3047
http://www.njsiaa.org
SoGARef