So USBC says....."A player started league bowling right handed, but later decided to use a two-handed appraoch. Is this a change of delivery and in violation of rule 118b?......No, as long as all deliveries are made with the right hand, this would not be a violation of rule 118b"
So lets say you are a 200 ave. bowler. You try two-handed and can only manage around 140. You establish a league avreage two-handed. Then when it comes to handicap tournaments you use one hand. SIMPLE.
Erin