Healthcare network adequacy requirement

[LTC8K6]

Can anyone shed any more light on this?

It's mentioned at the end of this NYP article.

http://nypost.com/2013/09/30/experts-fear-obamacare-rate-spiral/

She also said a “network adequacy requirement” for insurers means everyone on ObamaCare will be able to get to a doctor or hospital in their network within 30 minutes on public transportation.

And I think this is the rule:

http://www.law.cornell.edu/cfr/text/45/156.230

It seems to be a requirement that adequate health care can't be too far away from anyone, which sounds completely unworkable for much of the country.

Is that what this means? Is this a new requirement with PPACA? Or have I just not heard of it before? Was it just for Medicare?