Despite calls for a phased start to MiFID II over the last few weeks (see here), ESMA has reiterated that there are to be no further delays to the start, on 3rd January 2018. The stance was revealed in a keynote speech made by Steven Maijoor, Chair of ESMA, made at the IDX conference in London this week. The speech can be found here with the reference to delays on page 10. The speech also covers several other topics including the desired consolation of reporting requirements and Brexit.
In the meantime the Implementing Technical Standard which specifies when position reports are to be submitted to NCAs has been published in the official journal of the European Union and can be found here.