Years ago, we actually had a European codeshare with Iceland Air. That went away about ten years ago or longer. It was pretty insignificant to begin with, and hardly anyone even remembers. There was nothing in our early contracts to prevent it.
Then we signed an agreement to codeshare with Westjet, but backed out before ever selling a single codeshare ticket. Then we actually did codeshare with Volaris to Mexico, and the agreement between the union and company came with a limitation on codeshared ASMs as a percentage of Southwest ASMs. On our next CBA, we bargained for and got not only a reduced limitation on Volaris ASMs as a percentage, but also a total exclusion of all "far international" and all domestic codeshare with anyone, and "near international" codeshare was limited to exactly one carrier by name, Volaris. That's pretty much the story with Westjet and Volaris.
When the Volaris agreement expired (as it has now), there is no more codeshare allowed by our contract with two exceptions: the limited one with AirTran to allow for the absorption (in the side letter, with a drop-dead date of the end of 2014), and the possibility of limited, inter-island codeshare in Hawaii, whenever the hell we get around to going there. No more international codeshare, and absolutely no RJ codeshare amongst US cities. That's why after the AirTran acquisition, their existing RJ codeshare agreements were terminated immediately, other than to honor already-sold tickets.
Does that answer what you were asking, Dan?
Bubba