These proactive approaches will serve the employer, with respect to its obligations under the ADA, to put in place appropriate accommodations and to involve the union in the process of establishing decent housing under the NRA. A union will also benefit from these proactive approaches with respect to its legal obligations to the workers it represents. In particular, these proactive approaches will foster a positive and productive work environment for employers and unions and promote the ADA`s goal of integrating people with disabilities into employment and society. Justice Souter also wrote a dissenting opinion in which Justice Ginsburg joined. In reviewing legislative history, Justice Souter concluded that Congress intended to consider the impact on a collectively negotiated seniority system as a “factor” in assessing unwarranted hardship. As a result, he considered it inappropriate that a seniority system unilaterally imposed by an employer and not subject to protection by another federal statute, namely.dem National Labor Relations Act, be “more important.” They may still attempt to negotiate with the union to allow for single accommodation or to revise the collective agreement. In a workplace where employers and unions are experiencing persistent tensions, it is unlikely that the union will allow a deviation. These guidelines provide useful answers to a number of questions relating to appropriate provisions and unreasonable burdens. However, it takes a position on certain issues that contrafover court decisions and may not be enforced by the courts. In addition, it is strikingly silent on two points: any discussion of contracts is a tedious and costly process, where managers have to spend time solving problems. It is also risky because the union will use the discussion as a “marketing tool” by presenting itself as the defender of the struggling worker, when in fact it is the union contract that poses a challenge to accommodation issues. US Airways` seniority system was a policy defined by the employer and not as part of a collective agreement.