A broader process of expert engagement then took place through written consultations and several mini-workshops. This work was used as the basis for the initial policy paper, published in June 2009. The NAS identifies relevant parties for each action, but does not clearly assign responsibilities or indicate timescales for delivery, although these are sometimes implicit in the recommendation. It is particularly important to actively involve all relevant ministries and to effectively organise the modes of co-operation (e.g. by establishing an ad hoc interministerial working group or strengthening existing institutional groups), with clear agreements on the roles and functions of process leader and process partners.