Link to the whitehouse factsheet announcing this:
http://www.whitehouse.gov/the-press-office/2014/04/07/fact-s...
Relevant excerpt from the section "Attracting the World’s Best and Brightest": These proposed regulations include rules authorizing employment for spouses of certain high-skill workers on H-1B visas, as well as enhancing opportunities for outstanding professors and researchers.
As to what certain means remains to be seen.