(A)The term “active MSA participant” means, with respect to any taxable year, any individual who is the account holder of any Archer MSA into which any contribution was made which was excludable from gross income under section 106(b), or allowable as a deduction under this section, for such taxable year. (B)In the case of a cut-off year before 2007— (i)an individual shall not be treated as an eligible individual for any month of such year or an active MSA participant under paragraph (1)(A) unless such individual is, on or before the cut-off date, covered under a high deductible health plan, and (ii)an employer shall not be treated as an MSA-participating employer unless the employer, on or before the cut-off date, offered coverage under a high deductible health plan to any employee. (C)For purposes of subparagraph (B)— (i)Except as otherwise provided in this subparagraph, the cut-off date is October 1 of the cut-off year. (ii)In the case of an individual described in subclause (I) of subsection (c)(1)(A)(iii), if the regularly scheduled enrollment period for health plans of the individual’s employer occurs during the last 3 months of the cut-off year, the cut-off date is December 31 of the cut-off year. (iii)In the case of an individual described in subclause (II) of subsection (c)(1)(A)(iii), the cut-off date is November 1 of the cut-off year. (iv)If 1997 is a cut-off year by reason of subsection (j)(1)(A)— (I)each of the cut-off dates under clauses (i) and (iii) shall be 1 month earlier than the date determined without regard to this clause, and (II)clause (ii) shall be applied by substituting “4 months” for “3 months”.