Can I take your number? http://al4a.fun/ a4a.com This year, 30,000 Scouts ages 12 to 20 and their leaders were required to meet a threshold for body mass index and other health factors before being allowed to participate. Jamboree applicants with a BMI — a measure of body fat determined through height and weight — of 40 or higher were deemed ineligible. Those who fell between 32 and 39.9 faced providing additional health information to Jamboree medical staff.