plan coverage of either spouse (and if such spouses both have family coverage under separate high deductible health plans, only one such coverage shall be taken into account), (ii) such limitation (after application of clause (i)) shall be reduced by the aggregate amount paid to Archer MSAs of such spouses for the taxable year, and (iii) such limitation (after application of clauses (i) and (ii)) shall be divided equally between such spouses unless they agree on a different division. (B) Treatment of additional contribution amounts If both spouses referred to in subparagraph (A) have attained age 55 before the close of the taxable year, the limitation referred to in subparagraph (A)(iii) which is subject to division between the spouses shall include the additional contribution amounts determined under paragraph (3) for both spouses. In any other case, any additional contribution amount determined under paragraph (3) shall not be taken into account under subparagraph (A)(iii) and shall not be subject to division between the spouses. . (b) Effective date The amendments made by this section shall apply to taxable years beginning after December 31, 2018. 6. Special rule for certain medical expenses incurred before establishment of health savings account (a) In general Section 223(d)(2) of the Internal Revenue Code of 1986 is amended by adding at the end the following new subparagraph: (D) Treatment of certain medical expenses incurred before establishment of account If a health savings account is established during the 60-day period beginning on the date that coverage of the account beneficiary under a high deductible health plan begins, then, solely for purposes of determining whether an amount paid is used for a qualified medical expense, such account shall be treated as having been established on the date that such coverage begins. . (b) Effective date The amendment made by this section shall apply with respect to coverage beginning after December 31, 2018. 7. Allowance of bronze and catastrophic plans in