(a) In general
Subject to the availability of appropriations, the Administrator shall provide funding to carry out groundwater research on enhanced aquifer use and recharge in support of sole-source aquifers, of which—

(1) not less than 50 percent shall be used to provide 1 grant to a State, unit of local government, or Indian Tribe to carry out activities that would directly support that research; and

(2) the remainder shall be provided to 1 appropriate research center.

(b) Coordination
As a condition of accepting funds under subsection (a), the State, unit of local government, or Indian Tribe and the appropriate research center that receive funds under that subsection shall establish a formal research relationship for the purpose of coordinating efforts under this section.

(c) Authorization of appropriations
There is authorized to be appropriated to the Administrator to carry out this section $5,000,000 for each of fiscal years 2022 through 2026.