The Scottish FA has asked Rangers chief executive Charles Green to clarify an accusation that bigotry played a part in the decision to refuse the club a Scottish Premier League place.
On Tuesday, the SFA confirmed its compliance officer Vincent Lunny had written to the former Sheffield United chief executive asking for clarification over his comments.
Mr Green, who made the claims in a media interview following the Ramsdens Cup win against Brechin City on Sunday, has until August 7 to respond.
Further action against the Rangers chief executive could follow depending on his response to the SFA request.
Over the weekend the Scottish Football Association agreed to grant the newco Rangers’ existing membership of the association on the basis of several conditions, including the repayment in full of all football debt built up during Craig Whyte’s nine-month reign.
Mr Green told BBC Scotland: "Some of it has been driven by bigotry, some of it's been driven by jealousy and some of it's been driven by all the wrong motives."
Asked to expand on what he meant by bigotry, the former Sheffield United chief executive said: "We've got a position whereby Rangers were thrown out of the league and these clubs are still appealing with fans to buy season tickets. What's happened with Rangers, as an outsider looking in, although I am now an insider, is absolutely incredible where it seems to me the whole of Scotland have wanted to kick this giant club while it was down."
Rangers manager Ally McCoist is currently waiting to learn if he will also be summoned to explain comments made about the SFA processes.
Mr McCoist had demanded that the identity of an anonymous disciplinary tribunal be made public after the club were found in breach of several rules earlier this summer, which resulted in them being fined £160,000 and handed a 12-month transfer ban.
The SFA has said that no decision will be taken over his comments until all remaining issues surrounding the club have been dealt with.
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