Gunn's action had previously been analysed in April 2007
England fast bowler Jenny Gunn has had her bowling action cleared by the International Cricket Council (ICC).
The 22-year-old was suspended from Australian state cricket in February after failing tests under their doubtful bowling action procedures.
She was then reported following England's World Cup win over Sri Lanka on Sunday, when umpires raised concerns about her short-pitched deliveries.
But Dr Mark King's report to the ICC has declared her action to be legal.
King, who is a member of the ICC panel of human movement specialists and is based at Loughborough University, stated after reviewing footage of Tuesday's win against India that Gunn's action was consistent with her action when it was analysed in April 2007 and found to be legal.
"The recordings are consistent with the rear view recordings (from both March 2009 and April 2007) which clearly shows that Miss Gunn's bowling arm goes from a near straight position when the upper arm is horizontal into extreme hyperextension and then back to a near straight position around the time of ball release," King said.
"The unusual amount of hyperextension and abduction may well create the illusion that Ms Gunn throws but that is not the reality. Her action complies with ICC regulations and the Laws of Cricket."
Sri Lanka off-spinner Rose Fernando was also reported for an illegal action in the match with England.
Under International Cricket Council regulations, any bowler "called" for throwing or reported for a suspect action must be assessed by their country's board - in this case the England and Wales Cricket Board - and must undertake any remedial work required.
Gunn has played six Tests, 64 one-day internationals and 10 Twenty20 matches for England - and took 3-50 against India on Tuesday.