(a) The Department shall submit to the U.S. Environmental Protection Agency a Chesapeake Bay Total Maximum Daily Load Phase III Watershed Implementation Plan climate load allocation addendum and updated 2–year milestones that fully offset additional nitrogen, phosphorus, and sediment loads attributable to the impacts of climate change as determined and allocated by the Chesapeake Bay Program.
(b) The Department shall fully implement the addendum and updated milestones under subsection (a) of this section on or before December 31, 2025.