Most of the news reports I've read have suggested the same time line
EU Transport Commissioner Jacques Barrot said he would ask EU nations to back the deal when EU transport ministers meet March 22. The U.S. Congress must also back the deal before the new rules would kick in Oct. 28.
With regard to Aer Lingus/Ireland ... RTE's news at nine o clock said it signaled the end of the Shannon stopover.
http://www.businessweek.com/ap/finan.../D8NK771O0.htm
JAS