if applicable. (c) Availability of payment or reimbursement (1) Commencement Health insurance support under this subchapter shall commence being available as follows: (A) With respect to covered veterans in priority group 1, 2, or 3, on the first day of the first month that begins on or after the date described in section 2(c)(3) of the Veterans Empowerment Act . (B) With respect to covered veterans in a priority group other than 1, 2, or 3, on the first day of the first month that begins on or after the date that is 180 days after the commencement date under paragraph (1). (2) Exclusion of certain veterans A covered veteran is not eligible for health insurance support under this section if such veteran— (A) first enrolls in the system of annual patient enrollment established and operated by the Secretary under section 1705(a) of this title on or after the date of the enactment of this Act