(Not a Teacher)
That's what I'd write. I hesitate to say the original sentence is wrong though.
washingtonpost.com/national/san-francisco-could-allow-tiniest-apartments-in-us-as-small-as-220-square-feet/2012/09/24/07b2412e-066f-11e2-9eea-333857f6a7bd_story.html"
"Supervisors are set to vote on Tuesday on a proposed change to the city’s building code that would allow construction of among the tiniest apartments in the country."
Shouldn't it be "construction of what are among the tiniest"?
(Not a Teacher)
That's what I'd write. I hesitate to say the original sentence is wrong though.
The subject ('of among') shows what is bothersome about not signposting the subordinate clause - having a string of prepositions like this doesn't do much to enhance communication. It's not wrong but it's not advisable.
b