How do two referees share decisions, and what if we whistle different fouls at once?

Question

Accepted Answer

Under World Aquatics rules (Part Six, Articles 3.6 and 3.8):

The referees are jointly in absolute control. Each has full, equal and overriding authority, observes the whole match, and may make any decision anywhere in the field of play.
You may consult the other referee or any official if you think it helps (for example they had a better view), but you don't have to.
If you make conflicting decisions, consult and give a joint decision.

Simultaneous fouls for opposing teams (if no joint decision is reached):

Calls	Result
Ordinary foul v ordinary foul	Neutral throw
Ordinary foul v exclusion or penalty foul	The exclusion or penalty foul stands
Exclusion foul v penalty foul	The penalty foul stands
Goal throw v corner throw	Corner throw
Exclusion v exclusion	Both players excluded; free throw to the team that had the ball, shot clock not reset (neutral throw and clock reset if neither had it)
Penalty v penalty	Each team takes one; the team in (or last in) possession shoots first, then a free throw on or behind halfway to that team with 28 seconds

Simultaneous fouls for the same team: two ordinary fouls give a free throw from the ball's position; otherwise the more serious foul (exclusion over ordinary, penalty over exclusion, corner over goal throw) stands.