pursuant to section 1839(b) or section 1818(c) shall be effected in the case of any such individual who is deemed enrolled under part B or part A pursuant to the previous sentence with respect to any period prior to the date of such enrollment. (c) Auto enrollment of dual eligible individuals under Medicare Advantage plans (1) In general Except in the case of a State that has elected the maintenance of effort option described in section 1944(b)(2), in the case of an individual described in subparagraph (A)(ii) of section 1935(c)(6) (taking into account the application of subparagraph (B) of such section), the Secretary shall establish a process for the enrollment in an MA–PD plan that is a managed care plan under part C that has a monthly beneficiary premium that does not exceed the premium assistance available under section 1860E–41(b)(1)(A). If there is more than one such plan available, the Secretary shall enroll such an individual on a random basis among all such plans in the PDP region. (2) Right to disenroll Nothing in paragraph (1) shall prevent such an individual from declining enrollment in any such plan (and thereby obtaining coverage under Medicare fee-for-service) or from changing enrollment in such a plan to another MA–PD plan. 1860E–12. Coordination with part D (a) Deemed enrollment under part D (1) In general The Secretary shall establish a process that, beginning as of the general effective date, provides for the enrollment in a prescription drug plan that has a monthly base beneficiary premium that does not exceed the weighted average of premiums for such plans that provide standard prescription drug coverage (as defined in section 1860D–2(b)) with respect to the area involved (on a random basis among all such plans in the applicable PDP region) of each Medicare enrollee (as defined in section 1860E–51) who— (A) failed to enroll in such a prescription drug plan during the applicable enrollment or coverage election period under section 1860D–1(b)