Players' Association chief Paul Marsh has claimed that Australian cricketers are "very disappointed" with CA for approving to trail the split-innings one-day format in the National Cup.
The new format will be used across all 31 matches in the domestic competition.
"The decision by CA to trial the split innings format in this year's domestic one-day event was made before collective player input was even sought," Marsh was quoted as saying by 'The Australian Associated Press'.
"For the people that play and know the game better than anyone, this process has been difficult to comprehend and players are very disappointed," he claimed.
The format was approved by the board after being shown green light by CA's playing conditions committee which includes former players Mark Taylor, Matthew Hayden, Greg Chappell, Shane Warne, Marsh and CA chairman Jack Clarke.
Marsh said players were not against changes in the game but they did not consider split innings format a solution.
"Players are open to changes to any format of the game that can make the game better," he said.
"They acknowledge that the one-day format has had its recent challenges and as a collective they want to help those running the game find the best solution.
"However, the players don't believe the split innings format is the best solution," he added.
Cricket Australia was quick to react with its CEO James Sutherland saying that the changes are bound to create "understandable discomfort or trepidation" but players "are not the only stakeholders" in the game.
"In talking to stakeholders, the ultimate thing was the tournament should be played over the course of a whole year," said Sutherland.
"To do a proper trial and to ensure the public fully understand the way it's played, certainly that was the feedback from fans and other stakeholders. There is no doubt there are issues for individual players and preparation for the World Cup coming up," he added.