plateau set forth by the Centers for Disease Control and Prevention. Such plan shall be developed in consultation with State, local, and Tribal public health departments, include key performance indicators tied to field best practices for contact tracing and supported isolation as well as testing, and be submitted as an addendum to any similar plan a State or Indian Tribe previously submitted to the Secretary, as required pursuant to the Paycheck Protection Program and Health Care Enhancement Act ( Public Law 116–139 ). The Secretary shall make each plan submitted under this paragraph publicly available 60 days after submission. (c) Expiration Amounts appropriated under this section and made available to States and Indian Tribes for testing procurement shall remain available until the later of December 31, 2021, or the date that is 90 days after the public health emergency declared by the Secretary of Health and Human Services under section 319 of the Public Health Service Act ( 42 U.S.C. 247d ), on January 31, 2020, with respect to COVID–19 expires, and, on such applicable date, any such funds that remain unobligated shall be remitted to the Treasury of the United States. (d) Coordination The Secretary shall develop a plan to coordinate and provide guidance to States and Indian Tribes in drafting their testing plans described in this section and seek to support the development of shared indicators for all States and Indian Tribes. 4. Definitions For purposes of this Act: (1) The terms COVID–19 test , COVID–19 testing , and testing mean a viral or serological in vitro diagnostic test defined in section 809.3 of title 21, Code of Federal Regulations (or successor regulations) for the detection of SARS–CoV–2 or the diagnosis of the virus that causes COVID–19, and the administration of such test, that— (A) is approved, cleared, or authorized under section 510(k), 513, 515, or 564 of the Federal Food, Drug, and Cosmetic Act ( 21 U.S.C. 360(k) , 360c, 360e, 360bbb–3)