42 U.S. Code § 300j–11 - Indian Tribes
For any provision of this subchapter where treatment of Indian Tribes as identical to States is inappropriate, administratively infeasible or otherwise inconsistent with the purposes of this subchapter, the Administrator may include in the regulations promulgated under this section, other means for administering such provision in a manner that will achieve the purpose of the provision. Nothing in this section shall be construed to allow Indian Tribes to assume or maintain primary enforcement responsibility for public water systems or for underground injection control in a manner less protective of the health of persons than such responsibility may be assumed or maintained by a State. An Indian tribe  shall not be required to exercise criminal enforcement jurisdiction for purposes of complying with the preceding sentence.
 So in original. Probably should be capitalized.
LII has no control over and does not endorse any external Internet site that contains links to or references LII.