ref18 is correct.
However, in the pre-game meeting with the coaches, the white hat will ask if there are any tinted visors. If there are (the other 4 officials doing their walkaround will double check all players), then the WH will allow them to play once the HC confirms that the proper papers are in file with the league.
A league doing it's job also provides a list to all WHs who the confirmed players are in the league with tinted visors.
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Pope Francis
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