In general— Notwithstanding chapter V of the Federal Food, Drug, and Cosmetic Act (
21 U.S.C. 351 et seq.) and section 353 of the Public Health Service Act (
42 U.S.C. 263a), during any public health emergency declared by the Secretary of Health and Human Services (referred to in this section as the “Secretary”) under section 319 of the Public Health Service Act (
42 U.S.C. 247d) or by a State in accordance with the law of the State, the public health department of such State (or such other State entity as designated by the Governor of the State) may clear or approve diagnostic tests or diagnostic devices, for use in that State during the applicable public health emergency only.