Last week, ESMA said its MiFID II rules may take an extra year to implement. Steven Maijoor, ESMA's chair, said that "building of some complex IT systems can only really take off when the final details are firmly set in the [regulations]." I don't know which part of the 552-page regs he's referring to, but based on just two little sections called RTS 6 and RTS 25, I can see what he means.