Teams of 4. 4 separate decades. Athletes must come from any combination. Example - 13-19 , 30-39, 40-49, 50-59 or 20-29, 30-39, 40-49, 60 plus. Can be any combination. Teams can also be made from birthdates 1960's , 1980's , 1990's and so forth. 

Can be all Male, Female or Mixed 2/2