Papua New Guinea's highest authority has reinstated as prime minister veteran leader Sir Michael Somare, one of two men claiming to hold the post.
The governor general, who represents head of state Queen Elizabeth II, backed an earlier court ruling supporting Sir Michael's claim.
His rival, Peter O'Neill, is still refusing to accept the decision.
The political crisis flared when Sir Michael returned from Singapore after recovering from serious illness.
During Sir Michael's absence, Mr O'Neill had been installed as prime minister.
Source from BBC