Organisers of the Guinness Pro14 league have moved to cancel the competition's final, after the outbreak of the Covid-19 virus, while the IRFU have announced the immediate end of the domestic rugby season.
The Pro14 decision comes a week after organisers decided to indefinitely suspend the competition.
The board of Celtic Rugby DAC met by teleconference and agreed upon a strict list of criteria that would enable the Championship to recommence.
In statement, those criteria were laid out as being; "Public Health Authorities cease to prohibit the resumption of sport and group training.
"Travel restrictions between our territories are lifted.
"No forced isolation or quarantine orders are in force when visiting our territories.
"Player welfare is safeguarded, including requirement for a suitable pre-recommencement training period, to be established in conjunction with the high-performance personnel at our participating unions and teams.
With the 20 June final in Cardiff now cancelled, the league has put in place new plans for a final should one be played.
Under those plans it will be hosted by the team with highest ranking based upon league records from this campaign.
Meanwhile the IRFU have announced that the domestic season is to conclude with immediate effect
Cups will be shared by finalists, where cup competitions have reached the final fixture and there will be no promotion or relegation in any of the five divisions of the Energia Men's All-Ireland League.
The planned expansion of the Energia Women’s All-Ireland League for the 2020/21 season remains in place.
There will be no league or cup winners in any competition organised at a national level including the Energia All-Ireland Leagues, Energia Women's All-Ireland Cup and the Energia Bateman Cup.
Speaking about the announcement, IRFU Director of Rugby Development Colin McEntee said: "The decision to end the domestic rugby season for 2019/2020 season has not been made lightly. All options were discussed and the IRFU is satisfied it has arrived at the only equitable solution.
"These are challenging times for us all and we know clubs will be impacted by this directive, but we will look back at this season as one where we put the physical welfare of our rugby community above all else.
"Clubs are now in a position to make plans for the 2020/21 season. We look forward to marking the 30th anniversary of the All-Ireland League."