United have also been vehement in their defence of Ferdinand, although their stance has been criticised by many experts, who believe the £29.3million defender should be given the maximum two-year ban for missing the test.
Under the International Olympic Committee's strict liability rule, forgetting to attend a test offers no defence against punishment.
However, FA executive director David Davies last weekend admitted his own organisation's regulations do not cover such a scenario.
Sepp Blatter has condemned United's decision to keep playing Ferdinand until his hearing.
The FIFA president also questioned the validity of the team's results during that period.
United chief executive David Gill responded today by rejecting Blatter's statement.
He said: "There have been many comments during the Rio Ferdinand case which have not been very helpful.
"We are at liberty to keep playing Rio Ferdinand and that is what we are doing. Frankly, this is an incomprehensible statement by Sepp Blatter.
"We are clearly abiding by the rules and the FA have confirmed that. If they changed the rules so he was not allowed to play we would abide by those."
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