The Gulf nation said late yesterday it had filed the grievance with the WTO's dispute settlement body alleging that Saudi Arabia, the United Arab Emirates and Bahrain are violating laws and conventions related to trade.
The three countries, along with Egypt, cut diplomatic ties and severed air, land and sea links with Qatar on June 5, accusing it of supporting extremists. Qatar denies the charge and sees the boycott as politically motivated.
It calls for the start of formal consultations with the three Gulf states and lays out specific trade violations, according to a statement released by Qatar's government communications office.
It argues the boycott hurts not only Qatar, which is the world's biggest exporter of liquefied natural gas, but also its trading partners.
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"This positive step taken by the State of Qatar clearly demonstratestoall member countries of the WTO the level of transparency exhibited by the State of Qatar through requesting formal and transparent dialogue andconsultations with thesiegecountries," the statement said.
Qatar has rejected a tough 13-point list of demands from the Arab bloc, arguing that accepting them wholesale would undermine its sovereignty.
Fellow Gulf state Kuwait is mediating the crisis, but it and Western-led diplomatic efforts have so far failed to secure a breakthrough. Neither side has shown any significant sign of backing down.
The isolation campaign, which sealed Qatar's only land border with Saudi Arabia, has proved costly for the 2022 World Cup host, however.
The boycott has dramatically driven up costs to import food, medicine and likely even building materials that Qatar needs for extensive infrastructure projects.