The ruling on leading Australian photographer Bill Henson's portraits came two weeks after police shut his latest exhibit just before opening night and confiscated dozen of photographs of naked adolescent boys and girls to investigate whether they violated obscenity laws.

A spokeswoman for Australia's Classification Board, speaking on condition of anonymity under board policy, said six photos had been referred to them. The board gave five of them a G rating and one a PG.

The PG photo -- of a 13-year-old girl -- was used on the cover of the invitation to the exhibit. It was believed to have caused the initial complaints that led to the police shutdown of the exhibit and investigation into possible obscenity charges against Henson.

The image "creates a viewing impact that is mild and justified by context ... and is not sexualized to any degree," the board found.

Police did not immediately announce that they were closing their investigation, and it was not clear on Friday whether the ruling would lead to the reopening of the Henson exhibit at Roslyn Oxley9 Gallery. The gallery referred questions to Henson's publicist, who was not immediately available for comment.

Henson 52, a renowned artist whose work is displayed in galleries around the world, has not spoken publicly since the controversy erupted.