Mutton Bustin' Registration opens July 13, 2015, at 9am. Registration is first come first serve in office/in person only. Children aged 4 to 6 with birth dates between July 31, 2009 and July 31, 2011 are eligible and you must bring a copy of the child's birth certificate at the time of registration. There are only 30 registration spots available but any other applications received will be placed on a waiting list and will only be notified by telephone if they have been accepted. The child must weigh less than 65 lbs (pounds). Contestants must wear safety-approved helmets, long pants, long shirt, and closed toed shoes.