> So, does it mean FCC in 2015 created some rules in the absence of the law
No, actually, the court striking down the 2010 Open Internet Order as impermissible given the FCCs citation of Title I authority as it's basis specifically pointed to Title II common carrier classification as a basis that would support the kind of rules that the FCC had adopted.
(Why the FCC resisted Title II classification up through the 2014 draft of what became the 2015 order is an interesting question, of course.)
No, actually, the court striking down the 2010 Open Internet Order as impermissible given the FCCs citation of Title I authority as it's basis specifically pointed to Title II common carrier classification as a basis that would support the kind of rules that the FCC had adopted.
(Why the FCC resisted Title II classification up through the 2014 draft of what became the 2015 order is an interesting question, of course.)