I scanned the rules, too.
It looks like 15 Carrier requires .012" stranded lines, but it (you?) don't say how many. It's always been three (3). Please confirm that you don't intend to allow (2) .012" lines with the throttle controlled by radio.
Obviously, that would be both unsafe and unfair. A model with a radio-throttle and (2) .015" lines would still have an advantage, but at least be within the realm of safety.