Nothing exists from when Kings came out. The likely reason the REG left it out is that it's so old and non-controversial a ruling there was thought to be no need to be that specific. Furthermore, it says it continues to function, and Heroes cannot use EE's so it must convert in order to function. Further furthermore, it contains language with the archaic criteria for whether a SA converts, so it's clearly been carried over from the old REG piecemeal and is therefore suspect.