This was one of the most significant parts of the union contract, worked out over many long months of bargaining, and will serve as a national model for protecting non-tenure track faculty. The UAUO website reports on its successful implementation, after a lot of hard work by the union and the administration – and a lot of OA’s!
http://www.theatlantic.com/business/archive/2014/04/the-adjunct-professor-crisis/361336/