According to the World Bank, services account for about 75% of the EU economy, 80% of the US economy and the majority of the economies of most countries. The global economy is moving towards a service-oriented economy. cross-border trade in services for about 13% of global GDP in 2015; twice as much for the EU (about 24% of its total GDP). But it is not only these figures that prove that the TSA negotiations deserve much greater attention in the public debate than they currently have. Service providers may face trade barriers abroad when faced with opaque licensing or licensing systems. The annex of the national regulation aims to promote clear and effective disciplines in national regulation to ensure the predictability and transparency of authorisation or authorisation procedures. Under this schedule, Canada intends to introduce an innovative provision to ensure that measures relating to licensing and qualification requirements and procedures are not gender-discriminatory. The Air Services Annex aims to ensure legal certainty in terms of the scope and coverage of services covered by TISA in relation to the services covered by a party`s air transport agreements. The agreement has been criticized for the secrecy surrounding the negotiations.
The front page of the negotiating document leaked by Wikileaks reads: “Declassify on: five years after the TISA agreement came into force or, if no agreement enters into force, five years after the conclusion of the negotiations.”  Because of this practice, it is not possible to be informed of the liberalisation rules that the participating countries propose for the future agreement. Only Switzerland has the practice of making public on the Internet all the proposals it has made to the other parties since June 2012.  The European Union did not publish its “offer” for TISA until July 2014 after the Wikileaks revelation. The Trade in Services Agreement is the largest trade agreement of its kind in history. The economies of the 52 countries involved in the negotiations, managed by the United States, are at the forefront of services. According to the World Bank, services account for 75% of the EU economy, 80% of the US economy and most of the world economy.