1-1-1: Additional language was added to define the end wall. 
Rationale:  Since swimmers may now finish the race by contacting the end wall or touchpad, a more complete definition of what constitutes the end wall was necessary. 

1-4-5, 1-4-6, 9-2-1, 9-4-1d, 9-4-2, 9-4-4, 9-4-5: Diving rounds and diving sessions were defined.  
Rationale:  Rounds and sessions were used interchangeably in the rules book and clarity was necessary when referencing sessions during and 11-dive competition.      

3-3-3 NOTE, 3-3-4c:  The rule was updated to comply with current requirements of suit manufacturers.  
Rationale:  New language clarifies that a check mark placed adjacent to the FINA logo is compliant for high school competition.    

6-3-2: New language describes the manner in which an official time is obtained.
Rationale:   This rule change clarifies that other data points such as touchpad, buttons, or stopwatches may need to be used by the Referee to determine the swimmer’s time.    

6-3-4:  Added language describes when the backup system for timing and judging shall be operative.   
Rationale:   The change more accurately describes the protocol for determining an official time when automatic timing equipment malfunctions or is not activated.       

9-3-3, 9-3-5:  Headings were added to articles to assist with identifying a two-pronged process for entering a diver participating in a championship meet.
Rationale:  New rule organization clarifies the entry process.

2020-21 SWIMMING AND DIVING EDITORIAL CHANGES

4-1-3, 4-1-7, 4-5-1, 4-8-1f, 4-8-2, 4-9-1, 4-9-2, 4-9-3, 3-3-4 NOTE, Appendix B

2020-21 SWIMMING AND DIVING POINTS OF EMPHASIS

1. Communication between the Referee and Table
2. Establishing the Official Time
3. Diving Entries
4. Signals for Officiating Swimmers with Disabilities