World Rugby bosses have a strict rule prohibiting anyone involved in the game from betting on the sport.
The Welsh Rugby Union have begun an investigation into Rob Howley and a potential breach of those rules, Warren Gatland's number two having been sent home from the World Cup.
You can read the WRU statement about Howley in full here
No details are being given at this stage, but the WRU confirmed the probe into Howley is over World Rugby regulation 6, 'specifically betting on rugby union.'
Regulation 6 is headed 'Anti-Corruption and Betting' and covers a whole host of sub-sections.
One of those is under Regulation 6 sub 3.1, which is titled 'Prohibited Betting'.
It emphasises no-one involved in the sport is permitted to bet on any rugby match, including players, coaches, backroom staff, agents and match officials.
The regulation reads: "No connected person shall, directly or indirectly, bet and/or attempt to bet on the outcome or any aspect of any connected event and/or receive and/or attempt to receive part or all of the proceeds of any such bet, and/or any other benefit from a bet."
It goes on: "No connected person shall and/or shall attempt, directly or indirectly, to solicit, offer, induce, entice, instruct, persuade, encourage, agree with and/or facilitate any other party to bet and/or attempt to bet on the outcome or any aspect of any connected event."
Wales say Howley is co-operating fully with their inquiry and he will have to answer further questions back in Wales this week.
Regulation 6 sub-section 10 outlines the range of sanctions available for offences.
Under Prohibited Betting it says the minimum action is a reprimand or warning.
The maximum punishment is a ban from rugby full stop.
World Rugby also say 'The Judicial Committee or Judicial Officer shall have the discretion to impose a fine on the connected person."
An appeal against any punishment can be made.
