In June videos purportedly of Mr Amiri but containing contradictory information on his whereabouts emerged.
The US rejected Tehran's claims that it was behind Mr Amiri's disappearance.
The government has called on unions and employers to reach agreement.
More about: Economic crisis, Euro in crisis, Spain, Unemployment NZ: protection and recovery as Rena continues to break Almost the whole stern of the Rena which ran aground on a reef off the coast of New Zealand is now underwater.
Booms are being used to keep the slick from reaching the beaches.