Engineering and geoscience are regulated provincially/territorially in Canada, so licensure, discipline, and practice standards are administered by each jurisdiction’s regulator. National organizations (Engineers Canada and Geoscientists Canada) do not licence individuals, do not operate a single national registry, and do not impose binding national discipline rules (A, B). They also do not create a federal Engineering and Geoscience Act governing all practitioners (D). Their key role is coordination and harmonization: supporting consistent approaches among regulators for admissions and qualification recognition, facilitating labour mobility frameworks, developing model guides and best practices, supporting accreditation/education consistency (notably in engineering), and enabling inter-jurisdictional cooperation. This aligns with NPPE themes that public protection is achieved through consistent entry-to-practice and competence expectations while respecting provincial/territorial authority. Therefore, facilitating consistency of admissions, mobility, and competency requirements across regulators (C) is the best description.