(PP) Freedom's Way National Heritage Area. (QQ) Kenai Mountains-Turnagain Arm National Heritage Area. (RR) Mississippi Delta National Heritage Area. (SS) Mississippi Hills National Heritage Area. (TT) Muscle Shoals National Heritage Area. (UU) Northern Plains National Heritage Area. (VV) Sangre de Cristo National Heritage Area. (WW) South Park National Heritage Area. (XX) Any other National Heritage Area designated before the date of the enactment of this Act. (c) Relationship to the national park system (1) Relationship to national park units The Secretary shall— (A) ensure, to the maximum extent practicable, participation and assistance by any unit of the National Park System located near or encompassed by any National Heritage Area in local initiatives for that National Heritage Area that conserve and interpret resources consistent with an approved management plan for the National Heritage Area