Redesignates paragraphs (4), (5), and (6) as paragraphs (5), (6), and (4), respectively, and reorders those paragraphs.

Modifies paragraph (1) wording (inserting language regarding capacity or efficiency and reducing cost) and adds a new paragraph (5) promoting U.S.-based manufacturing of composite and additive manufactured marine energy components through collaborations with regional institutions of higher education and industry.

Revises multiple hydropower program provisions: replaces paragraph (3) to broaden collaboration to include State agencies, Tribal entities (including Alaska Native Corporations), and local agencies and to study methods to streamline and improve hydropower licensing including compiling environmental data and assessing environmental and economic impacts; modifies paragraph (6) wording to add support for studies and assessment of environmental impacts; adds a subparagraph to improve incorporation of hydropower and pumped storage in grid modeling; replaces paragraph (14) and adds new paragraphs to require testing mechanisms and systems, research on mitigating invasive species impacts, and support for workforce development (including Tribal workforce programs).

Makes multiple targeted edits to marine energy program purposes: expands 'infrastructure and facilities' to include 'equipment'; replaces references to 'smart building systems' with 'smart energy management systems' and explicitly references microgrids; shifts language to establishing and supporting manufacturing and industrial activity; expands enumerated applications and critical infrastructure resilience uses (including explicit citation to Critical Infrastructures Protection Act definition) and lists specific applications (desalination, disaster recovery, aquaculture, marine carbon dioxide removal, community microgrids, resilience demonstration sites); and adds a new paragraph directing development of marine energy systems for arctic marine environments.

Adds a new selection criterion considering whether an institution has access to regional test sites with unique natural advantages (e.g., high tidal ranges, strong currents, cold-water conditions); expands coordination language to include National Laboratories and 'other relevant Federal agencies'; and adds an explicit purpose to support workforce development, training, student-led research programs, and curriculum/education/outreach to grow the marine energy workforce.

Updates organization and administration provisions: expands references to include 'Tribal Colleges and Universities' and 'Alaska Native-serving institutions' alongside Minority Serving Institutions; replaces a reference to the United States Agency for International Development with 'the Department of State and the International Trade Administration of the Department of Commerce'; adds an interagency collaboration provision directing the Secretary to coordinate with the Secretary of Commerce to leverage NOAA and the National Sea Grant Program; revises award frequency language to require solicitation of applications not less frequently than once per fiscal year and, when funding is available, making awards; expands workforce development and training activities and collaborations; changes reporting from annual to biennial; and adds a new 'Briefing to Congress' requirement (not later than 1 year after enactment and at least once every 2 years thereafter) to provide the strategic plan and implementation progress to relevant congressional committees and the public.

Replaces the prior authorization amounts for fiscal years 2021-2025 with a new authorization of $300,000,000 for each of fiscal years 2026 through 2030; the amendment text includes placeholders for suballocations to marine energy and hydropower but does not specify numeric subamounts for those categories in the provided text.