Affairs and the Department of Defense. (2) Consultation by Secretary required The Secretary may not finalize any arrangement between the Service and a Department described in paragraph (1) without first consulting with the Indian tribes which will be significantly affected by the arrangement. (b) Limitations The Secretary shall not take any action under this section or under subchapter IV of chapter 81 of title 38, United States Code, which would impair— (1) the priority access of any Indian to health care services provided through the Service and the eligibility of any Indian to receive health services through the Service