; or (B) a part-time employee who agrees to serve for not less than 2 years in the service beginning on the date of the agreement. . 102. Medical credentialing system Title I of the Indian Health Care Improvement Act ( 25 U.S.C. 1611 et seq.), as amended by section 101, is further amended by adding at the end the following: 126. Medical credentialing system (a) In general (1) Development and implementation timeline By not later than 1 year after the date of enactment of the Restoring Accountability in the Indian Health Service Act of 2018 , the Secretary, acting through the Service and in accordance with the requirements described in subsection (b), shall develop and implement a Service-wide centralized electronic credentialing system (referred to in this section as the credentialing system ) to credential licensed health professionals who seek to provide health care services at any Service unit, including physicians, nurses and physicians assistants. (2) Implementation In implementing the credentialing system, the Secretary— (A) shall not require re-credentialing of licensed health professionals who were credentialed using existing Service policy prior to the date of enactment of the Restoring Accountability in the Indian Health Service Act of 2018 ; and (B) shall— (i) use the credentialing system for all new applications of licensed health professionals and the migration of credentials data that existed prior to implementation into the system; (ii) maintain the established timeline for re-credentialing of licensed health professionals who were credentialed prior to implementation, as defined by Service policy