Canberra three-time world champion Michael Rogers has called on the cycling's governing body to make therapeutic use exemptions black and white after his former team was accused of crossing ethical lines.
A United Kingdom parliamentary report said Team Sky used triamcinolone - a corticosteroid - to improve Sir Bradley Wiggins' "power to weight ratio" instead of using it as medication in the lead-up to his 2012 Tour de France triumph.
Rogers, a former Team Sky member and teammate of Wiggins, said the accusations in the report were "below the belt" and hoped the UCI and World Anti-Doping Agency moved to take away any grey areas.
The report, which was released on Monday, looked into the team's use of TUEs, which allow athletes to use a banned substance to treat medical conditions.
It said the TUE system was open to abuse, with athletes able to use it for performance enhancement rather than just health reasons.
Rogers rode for Sky in 2011-12 and was part of the team that helped Wiggins claim the yellow jersey.
He questioned the report's use of an anonymous source, who claimed Wiggins and "a smaller group of riders" had used corticosteroids out of competition.
The Tour stage winner felt the fact the source wasn't named, nor the riders alongside Wiggins, diminished the report's credibility.
"An anonymous source, I mean, they can't even name who it was, nor name the riders? That speaks for itself," Rogers told SBS's Cycling Central.
"I'm not saying it's being taken out of proportion, but it is way above the athletes. I think there is something going on at a political level.
"This report, without naming the source and just making a statement like that is definitely below the belt. It's got no basis.
"The anonymous source, come out and name yourself and name the people."
Rogers, who raced in the Tour de France 11 times and retired in 2016, told SBS Cycling Central he didn't take triamcinolone or corticosteroids - either with or without a TUE.
"I'm not in [a] position to comment on other people's medical records or details," he said.
"I had multiple doping tests during the 2012 season, including leading up to the Tour de France and during the Tour de France, and not one of them tested positive for corticosteroids."
He said the UCI and WADA needed to make the rules clear to ensure there was "no room for interpretation".
"Sport is being pushed into the position where if you need a TUE you're not fit to race," Rogers said.
"The rules need to be clarified so there is no room for interpretation by anyone except the governing body.
"It's the UCI and WADA's job to make a decision about TUEs because if you have a grey rule there then that rule will be utilised.
"Whether it's for wrong or for right I have no idea. I do not know the medical details of Bradley, I do not know the medical details of the other riders in the team.
"Everyone is talking about a grey area – eliminate the grey area. Make it black, or make it white."