The Italian national squad are set to resume training after an agreement was reached between the players and the FIR.
Disagreements over player payments have disrupted the start of Jacques Brunel's World Cup training camp.
An FIR statement on Saturday revealed that new agreements had now been put in place to allow the real work to begin.
Italy are currently ranked 15th in the world after winning only one match during the 2015 Six Nations.
The squad will now reconvene on Sunday before Monday's training sessions, ahead of taking on Ireland, France, Romania and Canada in Pool D at this year's tournament.
“Following the meetings of recent days it has been agreed with the players of the national team to ensure the resumption of training in preparation for Rugby World Cup 2015,” read an FIR statement.
“A number of requests made by the players’ agents were considered, and the agreement provides, in particular, financial rewards for all the players called to the pre-season gathering.”