; or (ii) in a habitat of national concern. (3) Funding (A) Federal share The Federal share of the cost of an activity carried out under the authority of this subsection shall be— (i) if the activity is funded wholly by funds made available by an entity, including the government of a foreign country, to the Federal Government for the purpose of responding to a severe marine debris event, 100 percent of the cost of the activity; or (ii) for any activity other than an activity funded as described in clause (i), 75 percent of the cost of the activity. (B) Limitation on administrative expenses In the case of an activity funded as described in subparagraph (A)(i), not more than 5 percent of the funds made available for the activity may be used by the Administrator for administrative expenses. . 4. Sense of Congress on international engagement to respond to marine debris It is the sense of Congress that the President should— (1) support Federal funding for research and development of bio-based and other alternatives or environmentally feasible improvements to materials that reduce municipal solid waste and its consequences in the ocean; (2) work with representatives of foreign countries that contribute the most to the global marine debris problem to learn about, and find solutions to, the contributions of such countries to marine debris in the world's oceans; (3) carry out studies to determine— (A) the primary means by which solid waste enters the oceans; (B) the manner in which waste management infrastructure can be most effective in preventing debris from reaching the oceans; (C) the long-term economic impacts of marine debris on the national economies of each country set out in paragraph (1) and on the global economy; and (D) the economic benefits of decreasing the amount of marine debris in the oceans