OA Region One – AK, ID, MT, OR, WA, WY, AB, BC, NWT, SK, Yukon

OA Region Two – CA, HI, Northern Sierra NV, Mexico

OA Region Three – AZ, CO, NV, NM, OK, TX, & UT

OA Region Four – KA, MO, IL, IO, NE, MN, SD, ND, NW Ontario, & Manitoba

OA Region Five – Northern IL, IN, KY, MI, OH, WI, & Southern Ontario

OA Region Six – NY, CT, MA, RI, NH, ME, VT, Central and Eastern Ontario, Quebec, Newfoundland, New Brunswick, Nova Scotia and Prince Edward Island

OA Region Seven – DE, MD, NJ, PA, VA, Washington, DC and WV

OA Region Eight – AL, FL, GA, LA, MS, NC, SC, TN, Puerto Rico, Virgin Islands, All South America, Central America and the Caribbean

OA Region Nine – Africa, Asia, Europe, Middle East, Central America, All other countries and territories not listed in Regions 1 through 8 or Region 10

OA Region Ten – Australia, New Zealand, Asia and Oceania