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PDF Document on NFHS 2020-2022 Rule Changes:
https://www.nfhs.org/media/4119414/2020-22-water-polo-rules-interpretation-powerpoint.pdf
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You Tube Video on NFHS 2020-2022 Rule Changes (Start at 17 minute mark):
https://www.youtube.com/watch?v=dGL10f5r3wg
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Calling the Penalty Foul (6M) by Levon Dermendjian on YouTube
https://www.youtube.com/watch?v=TRHl1HOMjeE
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Drive Exclusions and Offensive Penalties by Levon Dermendjian on YouTube:
https://www.youtube.com/watch?v=T_KxZm-qPFg
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Perimeter Exclusions with Levon Dermendjian on YouTube
https://www.youtube.com/watch?v=U-qdVu_3maw
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Putting the Ball in Play by Levon Dermendjian on YouTube
https://www.youtube.com/watch?v=EfhyNb0ZL8k
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Calling the Transition by Levon Dermendjian on YouTube
https://www.youtube.com/watch?v=9Q_aR2xjJ0o
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ILH Rules:
 
Length of Game
Intermediate: Four periods each of six (6) minutes
Varsity 2: Four periods each of seven (7) minutes
Varsity 1: Four periods each of seven (7) minutes
 

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