The SFA chief executive insisted there was no evidence of any organised wrongdoing in the Scottish game but admitted it was impossible to guarantee that the scene was entirely clean as he helped launch an anti-corruption initiative called "Keep It Clean" at Hampden yesterday.
An integrity hotline has also been created allowing players, coaches, match officials, club officials and football administration staff to anonymously flag up any concerns and suspicions they have about issues such as match-fixing, betting patterns or doping.
When asked if he could be certain that the Scottish game was untainted, Regan said: "Who knows? We have no evidence at all to suggest that Scotland has any problems of the kind of match-fixing or integrity levels that we're talking about. We've got to separate our betting [issues] from match-fixing and spot-fixing, they are very different things."
Ian Black, the Rangers midfielder, and Ayr United striker Michael Moffat have both faced SFA charges for contravening rules by betting on football (Black was given a 10-game suspension, with seven of them suspended, while Moffat's hearing is tomorrow). But Regan stressed that betting was an entirely separate issue from match-fixing.
"We've had examples of betting on football," he said. "Betting isn't allowed under the Scottish FA rules. We're working with the league bodies and PFA Scotland to make sure that message is constantly reminded to the people that need to know it. From a match-fixing and spot-fixing point of view, there isn't any evidence of it but you can't be complacent just because there's no evidence.
"When we see arrests being made close to home your antennae starts to kick in and you start to think well what do we need to do to make sure it doesn't come into Scotland? We pride ourselves on the reputation of the Scottish game."