According to the article, it told TRAI orally that they should read and read again the SC judgement. In it, apparently, they say that the entire 2017 order is upheld, including the 15% cap. But some interested parties, along with certain media outlets, made it look like TRAI did not have the right to impose 15% cap. This is what I read somewhere today.
You need to read sc order also . It upheld both trai regulation and Madras HC order. That's where the problem is as Madras hc stuck down 15% rule