; and (B) beginning in 2028, and annually thereafter, by April 15, a report on compliance with this subsection for the preceding year, including evidentiary documentation regarding such compliance. (4) Grants for transition assistance (A) In general Subject to the availability of appropriations, the Secretary of Energy shall make competitive grants to retail electric suppliers to pay up to 50 percent of the costs of meeting the requirements under this subsection. (B) Priority In awarding grants under this paragraph, the Secretary of Energy shall give priority to retail electric suppliers who display significant need, as determined by the Secretary, to finance their transition to renewable energy. (C) Application To be eligible to receive a grant under this paragraph, a retail electric supplier shall submit to the Secretary of Energy an application at such time, in such manner, and containing such information as the Secretary may require. (5) Best practices report Not later than 180 days after the date of the enactment of this subsection, the Secretary of Energy shall develop and publish, including on the public website of the Department of Energy, a report on the best practices for retail electric suppliers for activities to transition to renewable energy consistent with this subsection, including how to apply for a grant under this subsection. (b) Renewable energy sources (1) Regulations Not later than 180 days after the date of enactment of this subsection, the Secretary of Energy shall issue regulations regarding the sourcing, recycling, and disposal of materials used to manufacture renewable energy sources, with goals of— (A) eliminating the use of rare earth metals in the manufacture of renewable energy sources