Does that same caselaw imply that if police want to search an apartment without a warrant, and a landlord lets them in, but the tenant did not grant permission, the search was illegal? I was under the impression that that was permitted, which is a downside of living in an apartment/rental.
A few searches say that the landlord cannot consent to the search. A sample result:
http://www.nolo.com/legal-encyclopedia/landlord-give-consent...
Edit: Here it is, as long as they arrest the disagreeing party and remove them from the home, the Supreme court ruled the arrested party can no longer object to the search, and in that case they don't need a warrant. So I think the racket is they claim exigent circumstances to enter, arrest you, and then perform the search.
http://thefreethoughtproject.com/supreme-court-rules-cops-wa...
It's already almost certainly there. Its also there in virtually all rental agreements; the existing caselaw (cited in this decision) supports the position that using the managements authority to access for 'need' as a pretext for a search is unlawful.