; subsequent redesignation of rural emergency hospitals as CAHs Section 1820(c)(2) of the Social Security Act ( 42 U.S.C. 1395i–4(c)(2) ) is amended— (1) in subparagraph (B)(i)(I), by inserting subject to subparagraph (F), before is located ; and (2) by adding at the end the following new subparagraphs: (F) Option to waive distance requirement Beginning on the date of the enactment of this subparagraph, for every critical access hospital located in a State that is certified as a rural emergency hospital under section 1834(v)(3)(B), the State shall have the option of waiving the distance requirement described in subparagraph (B)(i)(I) with respect to another facility located in the State that is seeking designation as a critical access hospital under this paragraph. (G) Redesignation of a rural emergency hospital as a critical access hospital A rural emergency hospital that was previously designated as a critical access hospital under this paragraph may elect to be redesignated as a critical access hospital (in the same manner that the hospital was originally designated as a critical access hospital) at any time, subject to such conditions as the Secretary may establish. . (c) Studies and reports (1) Studies The Secretary of Health & Human Services shall conduct 3 studies to evaluate the impact of rural emergency hospitals on the availability of health care and health outcomes in rural areas (as defined in section 1886(d)(2)(D) of the Social Security Act ( 42 U.S.C. 1395ww(d)(2)(D) )). The Secretary shall conduct a study— (A) 2 years after the date of the enactment of this Act; (B) 5 years after the date of the enactment of this Act