One of the unique (and fun) aspect of ASA rules is that flip turns are permitted for breaststroke and butterfly. Of course, butterfly and breaststroke flip turns are not uniquely legal in ASA. Butterfly and breaststroke flip turns are legal in every swimming organization in the world; at least I’m not aware of any for which they are cause for disqualification.
What is unique in this regard about ASA rules is that ASA does not require a two-hand touch (or, for that matter, any hand touch.) A swimmer is only required to touch the wall with some part of his body. This, of course, allows for a much faster, smoother, more-swimming-like, reversal of direction (read: turn.)
By eliminating the hand touch requirement, we make the turn much easier to judge fairly. As such, there are way fewer disqualifications that shouldn’t have been and missed legitimate dqs. (And, as a result, fewer tears and many saved trees.) Moreover, meets become easier to run.
Breaststroke and butterfly become more inclusive. Newbies have greater success (helping retention).
The turns are faster, more fun, and more fun to watch.
The turns are more fungible, leaving more training time for swimming.
Butterfly and breaststroke flip turns are safer and less awkward when hand touches are not required.
Flip turns in practice provide better conditioning.
And, of course, they are faster. (I’m all for more of the race being swimming and less of it spent on non-swimming skills.)
Eliminating the hand touches for breaststroke and butterfly turns (as all swimming organizations have done previously for first freestyle and later for backstroke turns) is part our ASA’s grand experiment to make swimming more fun for participants and spectators and to make meets easier and faster to run.