Three different adsense codes on the same page

I'm considering a page setup where multiple users/adsense accounts have their own individual adsense units placed on the same web page.  In other words, Google would be crediting potentially three different accounts depending on whose adsense unit was clicked on the page at any given moment.  Would this be allowable under the current adsense usage policies?  I understand that the standard limit on types of adsense units would still apply.

Yes, that's allowed.