; and (C) the Secretary may establish a premium amount that is less than the premium amount otherwise provided. (2) Age cohorts The age cohorts specified in this paragraph are as follows: (A) Individuals under 19 years of age. (B) Individuals at least 19 years of age but not more than 25 years of age. (C) Individuals at least 26 years of age and not more than 35 years of age. (D) Individuals at least 36 years of age and not more than 45 years of age. (E) Individuals at least 46 years of age and not more than 55 years of age. (F) Individuals at least 56 years of age and not more than 64 years of age. (d) Treatment An individual enrolled under this part pursuant to this section shall not be treated as enrolled under this part (or any other part of this title) for purposes of obtaining medical assistance for Medicare cost-sharing or otherwise under title XIX. (e) Treatment with regard to employer responsibility In the case of an individual who voluntarily enrolls under this part pursuant to this section, the individual shall not be taken into account in applying any sanction against an employer of the individual under section 4908H of the Internal Revenue Code of 1986. .