conform to any requirement added by this section shall not be treated as a termination of such collective bargaining agreement. (C) Governmental plans In the case of a governmental plan (as defined in section 414(d) of the Internal Revenue Code of 1986), subparagraph (A) shall be applied by substituting December 31, 2021 for December 31, 2019 . (4) Exception for certain existing annuity contracts (A) In general The amendments made by this subsection shall not apply to a qualified annuity which is a binding annuity contract in effect on the date of enactment of this Act and at all times thereafter. (B) Qualified annuity For purposes of this paragraph, the term qualified annuity means, with respect to an employee, an annuity— (i) which is a commercial annuity (as defined in section 3405(e)(6) of the Internal Revenue Code of 1986)