; (ii) maintain the established timeline for re-credentialing of licensed health professionals who were credentialed prior to implementation, as defined by Service policy; and (iii) review credentials for all professionals in the system, based on updated policies, on a not less than yearly basis. Licensed health professionals whose credentials would not have been approved under the updated policies shall have 90 days to meet the new requirements. (b) Requirements In developing the credentialing system under subsection (a), the Secretary shall ensure the following: (1) Credentialing procedures shall be uniform and integrated throughout the Service. (2) With respect to each licensed health professional who successfully completes the credentialing procedures of the credentialing system, the Secretary may authorize each such professional to provide health care services at any Service unit. (3) Credentialing procedures shall include verification of licensure, education, employment history, and criminal background checks and history. (c) Consultation In developing the credentialing system under subsection (a), the Secretary shall consult with Indian Tribes and may also consult with any public or private association of medical providers, any government agency, or other relevant expert, as determined by the Secretary. (d) Application A licensed health care professional may not provide health care services at any Service unit, unless such professional successfully completes the credentialing procedures of the credentialing system developed under subsection (a). (e) Regulations The Secretary may prescribe such regulations as may be necessary to carry out the provisions of this section. (f) Rule of construction Nothing in this section may be construed— (1) to negatively impact the right of an Indian Tribe to enter into a compact or contract under the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 5304 et seq.)