Elsewhere in today's statement, the WRU accuses the regional clubs of not providing a "meaningful response" to its proposal for centrally contracting Welsh qualified regional players.
It also comments on player transfers.
The WRU accepts that some elite players will inevitably seek to leave Wales to achieve contractual incomes which are beyond the capacity of the current game in Wales.
The WRU funds the Regions to secure the release of those elite contracted players with an annual sum in excess of £6million. This £6 million is part of the £15 million distributed to the Regions annually by the WRU.
The WRU urges the Regions to abandon the practice of selling Welsh qualified senior players for profit before their contracts are concluded.
The WRU further urges all four Regions to inform other regions and the WRU, as a first priority, when they are seeking to sell or release any elite Welsh qualified player.
More top news
Gym coach Luke Griffin has been jailed for six years at Cardiff Crown Court after sexually abusing seven girls and one boy in his care.
The gang behind a £19million cocaine conspiracy are being sentenced in one of Dyfed-Powys Police's biggest ever operations.
Some interesting weather to start the weekend, with a yellow warning to "Be Aware" of heavy rain! But it will get better!