CIS-2014 in Minsk.

I repeat, the regulations will still be refined and will be based on SoD. But one thing is certain: it will be impossible to win the CIS tournament without playing x3dm1 even once. We are making as many concessions as possible to SoD due to objective reasons, but we are still leaving one small "requirement." ...

in the discussion about Stalin, here it's about the regulations, it seems like:
the regulations for the World Championship in ping-pong - the table is standard, the rackets are any (your own), But one thing is certain: it will be impossible to win the World Championship without playing on clay (tennis) even once.

Restrictions/penalties should be applied to those who have violated the rules (late, prolonged the game, etc., which leads to the disruption of the tournament) and only to them.

Added 5 minutes later

the regulations and conditions are determined by the host. ...

Only one regulation - this is a standard for any competition, but several regulations is a pun. Either clay or grass.