(a) The Secretary, acting through the Service, shall conduct a study to assess the feasibility of allowing an Indian tribe to purchase, directly or through the Service, managed care coverage for all members of the tribe from—

(1) a tribally owned and operated managed care plan; or

(2) a State licensed managed care plan.

(b) Not later than the date which is 12 months after October 29, 1992, the Secretary shall transmit to the Congress a report containing—

(1) a detailed description of the study conducted pursuant to this section; and

(2) a discussion of the findings and conclusions of such study.