Worldline's answer to the consultation is:
a) to enter into force, as consulted, on 1 August 2015 with the substance set out in this consultation paper, which means they would apply during a transitional period until stronger requirements enter into force at a later date under PSD 2 (i.e. a two-step approach)

Worldline rationale for its answer is basically that while many of the guidelines are meaningful, and contribute to a safer environment for internet payments, some may require some fine-tuning. In that respect a two-step approach will provide the necessary room for future adaptations.