The move followed an unsuccessful legal bid by HM Revenue and Customs (HMRC) at the Court of Session in Edinburgh to appoint its own administrator.
It has now emerged that Rangers' game against Kilmarnock on Saturday may not go ahead unless police can be paid.
Rangers owner Craig Whyte confirmed on Monday that the club had filed legal papers to appoint administrators.
It was initially thought that the club had 10 days to make a decision on whether to proceed, but the HMRC action on Tuesday changed the dynamic of the situation.
Duff and Phelps were later appointed as administrators and will now take over the day-to-day running of Rangers while addressing its massive debt problems.
Following the case a spokesman for HMRC said: "We can't discuss specific cases for legal reasons but tax that has been deducted at source from the wages of players and support staff such as ground keepers and physios, must be paid over to HMRC.
"Any business that fails to meet that basic legal requirement puts the survival of the business at risk."
Sir David Murray said he was "hugely disappointed" at Rangers' plight Former Rangers owner Sir David Murray said he was "hugely disappointed" at the club's decision to appoint administrators and expressed surprise at the timing of the decision.
Sport Minister Shona Robison said Rangers' current plight was "a concerning situation for everyone involved in Scottish football".
She said: "Football is our national game and it is now for the administrators to take forward the process of assessing the business and securing an outcome in the best interests of the club, its staff, supporters and the game of football as a whole in Scotland."