; and (4) identify opportunities to stimulate international cooperation relating to low-dose and low dose-rate radiation and leverage research and knowledge from sources outside of the United States. (d) Research plan Not later than 180 days after the date of enactment of this Act, the Secretary shall transmit to the Committee on Science, Space, and Technology of the House of Representatives and the Committee on Energy and Natural Resources of the Senate a 4-year research plan that identifies and prioritizes basic research needs relating to low-dose and low dose-rate radiation. In developing such plan, the Secretary shall incorporate the components described in subsection (b). (e) Definitions In this section: (1) Low-dose radiation The term low-dose radiation means a radiation dose of less than 100 millisieverts. (2) Low dose-rate radiation The term low dose-rate radiation means a radiation dose rate of less than 5 millisieverts per hour. (f) Rule of construction Nothing in this section shall be construed to subject any research carried out by the Secretary for the program under this section to any limitations described in 977(e). (g) Funding For purposes of carrying out this section, the Secretary is authorized to make available from funds provided to the Biological and Environmental Research Program— (1) $20,000,000 for fiscal year 2020; (2) $20,000,000 for fiscal year 2021; (3) $30,000,000 for fiscal year 2022; and (4) $30,000,000 for fiscal year 2023. . (b) Conforming amendment The table of contents for subtitle G of title IX of the Energy Policy Act of 2005 is amended by inserting after the item relating to section 977 the following: 977A. Low-dose radiation research program. . 3. Spending limitation No additional funds are authorized to be appropriated to carry out this Act and the amendments made by this Act, and this Act and such amendments shall be carried out using amounts otherwise available for such purpose.