D. Transparency 18. Effective implementation of the policy requires the understanding and cooperation of all stakeholders, including donor and programme countries, troop- and police-contributing countries and host countries of United Nations peacekeeping and political missions. Each entity mandated to or anticipating support for non‐United Nations security forces shall engage proactively with Member States and other relevant partners and stakeholders to explain the policy. 19. Before engaging in support to non-United Nations security forces, the responsible senior United Nations official[s] (e.g. Special Representative of the Secretary-General, Resident Coordinator, country representative) should inform the recipient authority/ies in writing of the United Nations core principles for support to non-United Nations security forces under this policy. In particular, recipients should be notified that United Nations support cannot be provided to units that fall under the command of individuals against whom there are substantiated allegations of grave violations of international humanitarian, human rights or refugee law. The recipient authority should also be advised of procedures or mechanisms to implement the policy, as outlined in section III below. It should be made clear to the recipient that, in order to sustain the support, the United Nations is obligated to continuously assess whether or not the recipient’s actions are consistent with the Organization’s obligations under the relevant bodies of law. While advocacy and communication may be undertaken by a specific United Nations entity, it should be coordinated to promote consistency across the United Nations in-country, and the most senior United Nations official in a given country (Special Representative of the Secretary-General and/or Resident Coordinator) should be kept informed of such steps. III. Ensuring effective implementation A. Elements of an implementation framework 20. Implementation of the human rights due diligence policy must take into account the specific mandates of the United Nations entity concerned, as well as the nature and extent of the support, and the political and operational context in which it is delivered.