Changes to USA-S Technical Rules Effective September 23, 2013
Since the 2013 USA Swimming Rule Book was printed, FINA the international organization which governs all the aquatic disciplines including swimming has made rule changes.
Since USA Swimming is required by law to follow the technical rules of FINA, these changes will become effective on September 23, 2013.
Rather than reprint the USA Swimming Rule Book, this document should be an addendum to your current 2013 rule book. The 2014 rule book will incorporate these changes under their respective sections when it is released.
Link to Revisions: Addendum to your current 2013 rule book
The backstroke changes are more cosmetic than substantive and should not affect how the backstroke is currently judged.
The other backstroke change deletes the phrase at the finish regarding when a swimmer may be submerged.
The breaststroke and butterfly changes relate to the touches at the turns and finish.
The other change to both strokes amplifies what a swimmer may do at the turn.
The other butterfly change concerns the stroke and that the arms must be brought forward simultaneously and pulled back simultaneously under the water throughout the race.
The last point on swimwear just adds additional items which specifically cannot be used during the competition.