17 operations. Expertise can be drawn from various sources, ranging from credible online or written resources to consultation with recognized experts. The statement of commitment should be publicly available. It should be communicated actively to entities with which the enterprise has contractual relationships; others directly linked to its operations, which may include State security forces; investors; and, in the case of operations with significant human rights risks, to the potentially affected stakeholders. Internal communication of the statement and of related policies and procedures should make clear what the lines and systems of accountability will be, and should be supported by any necessary training for personnel in relevant business functions. Just as States should work towards policy coherence, so business enterprises need to strive for coherence between their responsibility to respect human rights and policies and procedures that govern their wider business activities and relationships. This should include, for example, policies and procedures that set financial and other performance incentives for personnel; procurement practices; and lobbying activities where human rights are at stake. Through these and any other appropriate means, the policy statement should be embedded from the top of the business enterprise through all its functions, which otherwise may act without awareness or regard for human rights. Human rights due diligence 17. In order to identify, prevent, mitigate and account for how they address their adverse human rights impacts, business enterprises should carry out human rights due diligence. The process should include assessing actual and potential human rights impacts, integrating and acting upon the findings, tracking responses, and communicating how impacts are addressed. Human rights due diligence: (a)  Should cover adverse human rights impacts that the business enterprise may cause or contribute to through its own activities, or which may be directly linked to its operations, products or services by its business relationships;