may implement guidelines established by the Secretary, consistent with subsection (b), to identify those cases in which enrollment of an individual otherwise entitled to medical assistance under this subchapter in a group health plan (in which the individual is otherwise eligible to be enrolled) is cost-effective (as defined in subsection (e)(2));

may require, in case of an individual so identified and as a condition of the individual being or remaining eligible for medical assistance under this subchapter and subject to subsection (b)(2), notwithstanding any other provision of this subchapter, that the individual (or in the case of a child, the child’s parent) apply for enrollment in the group health plan; and

in the case of such enrollment (except as provided in subsection (c)(1)(B)), shall provide for payment of all enrollee premiums for such enrollment and all deductibles, coinsurance, and other cost-sharing obligations for items and services otherwise covered under the State plan under this subchapter (exceeding the amount otherwise permitted under section 1396o of this title), and shall treat coverage under the group health plan as a third party liability (under section 1396a(a)(25) of this title).