The parties recognize that teaching, research and other activities performed by GAs have also been performed and will continue to be performed by others within the University, including faculty members (including adjuncts), visitors, undergraduates, post-doctoral individuals, vendors, laboratory technicians, research assistants, research associates and other employees. The University shall not, however, replace GAs with outside contractors or personnel from outside temporary agencies without bargaining with the Union over the decision to do so and any effects of such replacement.