here is a quote from President Obama regarding the Orders:
"So I'm going to be signing three executive orders designed to ensure that federal contracts serve taxpayers efficiently and effectively. One of these orders is going to prevent taxpayer dollars from going to reimburse federal contractors who spend money trying to influence the formation of unions. We will also require that federal contractors inform their employees of their rights under the National Labor Relations Act. Federal labor laws encourage collective bargaining, and employees should know their rights to avoid disruption of federal contracts.
And I'm issuing an order so that qualified employees will be able to keep their jobs even when a contract changes hands. We shouldn't deprive the government of these workers who have so much experience in making government work."
http://www.whitehouse.gov/blog_post/Todaysevent/