; (4) to assist in the evaluation of foreign credentials; (5) to support preceptorships for international medical graduates in hospital primary care training; and (6) to facilitate access to contextualized and accelerated courses on English as a second language. 314. Study and report on strategies for increasing diversity (a) Study The Comptroller General of the United States shall conduct a study on strategies for increasing the diversity of the health professional workforce. Such study shall include an analysis of strategies for increasing the number of health professionals from rural, lower income, and underrepresented minority communities, including which strategies are most effective for achieving such goal. (b) Report Not later than 2 years after the date of enactment of this Act, the Comptroller General shall submit to Congress a report on the study conducted under subsection (a), together with recommendations for such legislation and administrative action as the Comptroller General determines appropriate. 315. Conrad State 30 and physician retention (a) Conrad State 30 program extension Section 220(c) of the Immigration and Nationality Technical Corrections Act of 1994 ( Public Law 103–416 ; 8 U.S.C. 1182 note) is amended by striking September 30, 2015 and inserting September 30, 2021 . (b) Retaining physicians who have practiced in medically underserved communities Section 201(b)(1) of the Immigration and Nationality Act ( 8 U.S.C. 1151(b)(1) ) is amended by adding at the end the following: (F) (i) Alien physicians who have completed service requirements of a waiver requested under section 203(b)(2)(B)(ii), including— (I) alien physicians who completed such service before the date of the enactment of the Conrad State 30 and Physician Access Act