; and (2) rivers and coastal areas that are the most severe sources of marine debris. (d) Effectiveness measurement In prioritizing and expediting efforts and assistance under this section, the officials specified in subsection (b) shall use clear, accountable, and metric-based targets to measure the effectiveness of guarantees and assistance in achieving the policy described in section 201. (e) Rule of construction Nothing in this section may be construed to authorize the modification of or the imposition of limits on the portfolios of any agency or institution led by an official specified in subsection (b). 203. United States leadership in international fora In implementing the policy described in section 201, the President shall direct the United States representatives to appropriate international bodies and conferences (such as the United Nations Environment Programme, the Association of Southeast Asian Nations, the Asia Pacific Economic Cooperation, the Group of 7, the Group of 20, and the Our Ocean Conference) to use the voice, vote, and influence of the United States, consistent with the broad foreign policy goals of the United States, to advocate that each such body— (1) commit to significantly increasing efforts to promote investment in well-designed waste management and plastic waste elimination and mitigation projects and services that increase access to safe waste management and mitigation services, in partnership with the private sector and consistent with the constraints of other countries; (2) address the waste management needs of individuals and communities where access to municipal waste management services is historically impractical or cost-prohibitive; (3) enhance coordination with the private sector— (A) to increase access to solid waste management services; (B) to utilize safe and affordable reusable alternatives to disposable plastic products, to the extent practicable; (C) to encourage and incentivize the use of recycled content