Once the pension begins making periodic pension distribution, the plan must continue making the periodic pension distributions and they are not eligible for rollover (no matter how a rollover might be done). The requirement that the distributions be made and their unconditional ineligibility for rollover are the same as would be for an RMD from an IRA. (Note, however, that the allowance by the IRS to repay a 2020 RMD and report it as a rollover did not extend to periodic pension payments.)
