There isn't any regulation because the THREATS from the EU to impose it from above was enough for everyone but Apple to fall in line, and that's damn lucky because otherwise we might've not seen USB-C emerge in phones as well as it's done now. (Do we need a new standard in the future? Hopefully that can happen without clunky regulatory processes)

Personally I like my lighting cables and I do hope there'll be a grandfather clause but Apples behaviour(logical for them) has put us in an uncomfortable seat tbh.