Notification of the GCC to the WTO as a Customs Union: The Whys and Hows - Global Trade and Customs Journal View Notification of the GCC to the WTO as a Customs Union: The Whys and Hows by - Global Trade and Customs Journal Notification of the GCC to the WTO as a Customs Union: The Whys and Hows 10 5 Global Trade and Customs Journal