Negotiations on the opening of BASA are generally discussed by the Ministry of Aviation after extensive consultations with aviation supervisors and relevant institutions, including immigration authorities.B. However, it is customary for airlines wishing to extend their routes to a target destination to lobby the Ministry of Aviation diplomatically to conduct formal talks that generally lead to negotiations between countries. In general, basA`s negotiations are based on the five freedoms provided for by the International Air Services Agreement (IATA), which are defined as: the bilateral system is based on the Chicago Convention and the related multilateral treaties. The Chicago Convention was signed in December 1944 and has governed international air services ever since. the convention also contains a number of annexes covering issues such as aviation safety, safety monitoring, seaworthiness, navigation, environmental protection and facilities (acceleration and departure at airports). One of the first AAS after World War II was the Bermuda Agreement, signed in 1946 by the United Kingdom and the United States. The characteristics of this agreement have become models for the thousands of agreements that were to follow, although in recent decades some of the traditional clauses of these agreements have been amended (or “liberalized”) in accordance with the “open skies” policy of some governments, particularly the United States.  The Scandinavian countries – Denmark, Norway and Sweden – have long-standing cooperation in aviation policy. Normally, Scandinavian countries negotiate in joint delegation with other countries. However, Denmark, Norway and Sweden conclude bilateral agreements with other countries, but with largely identical texts. At a press conference in January 2017, the Director General of the Nigerian Civil Aviation Authority revealed that Nigeria concluded bilateral air transport agreements with 90 countries in December 2016. It is very important to note, however, that only about 30 of these agreements are active. However, bilateral agreements between countries that are part of the European internal aviation market have mostly become obsolete.
In addition to the Community Member States, Iceland, Norway and Switzerland are also part of this market. For air services in this market, see Regulation (EC) No. 1008/2008 of the European Parliament and the Council of 24 September 2008 establishing common rules for the operation of air services in the Community, applicable to a few minor exceptions. The negotiating power of negotiating countries plays an important role in the BASA negotiations. In determining the negotiating power of the negotiating countries, the following must be taken into account: in 1913, a bilateral exchange of notes  between Germany and France was signed in the earliest of such agreements, in order to guarantee airship services. The Australian government has negotiated 90 bilateral air services agreements and related agreements.