The IRS has released Model Amendments that defined Benefit plans that wish to allow for the payment of bifurcated benefits, for example, part annuity and part lump sum, can use to comply with the requirements of Section 417(e).

Document Excerpt
This notice provides model amendments that a sponsor of a qualified defined benefit plan may use to amend its plan document to offer bifurcated benefit distribution options to participants in accordance with final regulations issued under § 417(e) of the Internal Revenue Code (see T.D. 9783, 2016-39 I.R.B. 396, published in the Federal Register on September 9, 2016 (81 FR 62359)).

Link
https://www.irs.gov/pub/irs-drop/n-17-44.pdf