such a plan through any internet website maintained by an Exchange established under title I of such Act (as described in such section). (3) Medicaid managed care States are prohibited from buying their Medicaid beneficiaries ages 50 to 64 into Medicare under this section, and individuals otherwise eligible for enrollment under a State plan under title XIX are prohibited from coverage under this title pursuant to enrollment under this section. The preceding sentence shall not apply to Medicaid beneficiaries whose Medicaid coverage or eligibility does not meet the definition of minimum essential coverage under a government-sponsored program under section 1.5000A–2 of title 26, Code of Federal Regulations (or any successor regulation). (4) Access to Medigap Coverage provided through medicare supplemental policies certified under section 1882 shall be made available to individuals eligible for enrollment pursuant to this section for enrollment, information, comparison, and otherwise as such a policy through any internet website described in paragraph (2). (i) Oversight There is established an advisory committee to be known as the Medicare Buy In Oversight Board to monitor and oversee the implementation of this section, including the experience of the individuals enrolling under this section. The Medicare Buy In Oversight Board shall make periodic recommendations for the continual improvement of the implementation of this section as well as the relationship of enrollment under this section to other health care programs. (j) Outreach and enrollment (1) In general During the period that begins on January 1, 2019, and ends on December 31, 2021, the Secretary shall award grants to eligible entities for the following purposes: (A) Outreach and enrollment To carry out outreach, public education activities, and enrollment activities to raise awareness of the availability of, and encourage, enrollment under this section. (B) Assisting individuals transition under this section To provide assistance to individuals to enroll