How can Dubya cancel Davis-Beacon Act by decree?

[Lasher]

I was just reading an article on the home page here titled, "The Enemy Within". It's very good, by the way. I am reminded that Dubya has repealed the Davis-Bacon Act, which mandates that federal contractors pay prevailing local rates or better. This is a law, previously enacted by both the Legislative and Executive branches of our federal government.

How can a law be suspended by decree of the Executive branch only? Shouldn't that require the consent of Congress? Is anyone citing anything that gives the * administration legal and constitutional authority to take such an action?