The FSA Championship Supporters Network has set up an Away Fan Working Group to look at different aspects of the away match experience, including seating allocations, supporter experiences, accessibility for fans, ticket prices and other elements of an away game. With recent discussions about increased ticket prices and potential reciprocal ticketing agreements between clubs, the group will focus on that as a priority, which will include looking at price caps
The article you linked published by the FSA just quotes the Leeds and Huddersfield groups, so at this stage it is not an official policy of the FSA Championship Network Supporters Group
In terms of this season, we asked LCFC to seek a price cap of £30 (to match the prices our away fans paid last season), so far (as posted in the FCC minutes) most clubs have not responded to LCFC's request to look at reciprocal deals. other than Norwich (£31) and now Leeds (the first to meet our £30 request).
We have always supported away price cap proposals previously and were part of the £20 is Plenty campaign several years ago