a plan with a premium below the benchmark. (d) Transition For beneficiaries who are in fee-for-service at the time of the enactment of this section, there shall be a limit on the amount of a premium increase allowable by year of no more than $20 per month compared to what such premium would have otherwise been if this subpart had not been enacted for each year through the fifth year. (e) Multiyear contracts A Medicare Advantage plan may offer to beneficiaries multiyear contracts with guaranteed premiums over such years, bearing the risk of any change in payments from the Secretary in subsequent years. A beneficiary enrolling under such a contract shall be exempt from the method described in subsection (a). . (b) Conforming amendments (1) Section 1853(a)(1)(A) of the Social Security Act is amended by striking and section 1859(e)(4) and inserting , section 1859(e)(4), and subpart 3 of part E . (2) Section 1853(j) of such Act is amended by inserting and subpart 3 of part E after subsection (o) . (3) Section 1854 of such Act is amended— (A) in subsection (a), after the heading, by inserting Subject to subpart 3 of part E: