Freedom rights can be found here.

http://people.hofstra.edu/geotrans/e...irfreedom.html

Sixth Freedom. The "unofficial" freedom to carry traffic between two foreign countries via the carrier’s home country by combining third and fourth freedoms. Not formally part of the original 1944 convention, it refers to the right to carry passengers between two countries (A and B) through an airport in the home country. With the hubbing function of most air transport networks, this freedom has become more common, notably in Europe (London, Amsterdam).