Six second-tier teams will be promoted to the Cymru Premier at the end of next season.
The FAW is pushing ahead with plans to expand the top-flight of Welsh football from 12 teams to sixteen, starting from the 2026-27 season.
It means the top three clubs from both the Cymru North and the Cymru South will be promoted at the end of the 2025-26 league season, subject to those clubs obtaining Tier One licences.
At the same time, the clubs finishing in the bottom two of the Cymru Premier will be relegated into the second-tier leagues.
An FAW spokesperson said the national leagues board has "the FAW has carefully considered a range of options to ensure a smooth and equitable progression to the expanded format."
They added a growth fund was being set up especially for Tier 2 clubs - such as Llantwit Major - in order to grow the number of Tier 1 licensed teams.
The expansion plans, first announced last September, are expected to see most games being played on Friday nights and the launch of a VAR Lite system as part of a £6 million investment programme.
The closing stages of the season will see the league split into three divisions
- Championship Race: the top six play each other one more time before the champions are crowned - with the other clubs qualifying for the end-of-season European play-offs.
- European Challenger: clubs from 7th to 10th play each other once more - with the winners going through to the play-offs.
- Survival Zone: clubs from 11th to 16th play each other once more - the bottom two are relegated while the club finishing in 14th faces a play-off final against the Cymru North or Cymru South runners-up
The expansion effectively reverses a decision made in 2010 to cut the number of top-flight teams, when the current 'Super 12' format was introduced.
Last month, Southern League club Merthyr Town voted unanmiously to reject an FAW approach to switch from the English non-league pyrmaid to the Cymru Premier.
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