Yes I now that. But what I meant was that if a competitor wants to compete in a WRC event, he/she can choose in witch class to compete (WRC or class 1 = 1.6T S2000) and by that the restrictor would be either 30 mm or 33 mm.
BTW, I couldn’t find any mention about the 30 mm restrictor in both WRC and regional championship regulations. The only one is the press release from FIA of 11th of February.
http://www.fia.com/en-GB/mediacentre...nal-rally.aspx
But as usually it will probably take few months for FIA to update this in the Article 255A.