457 plan distributions -- "substantially nonincreasing" requ

[Guest Patrick Foley]

Re minimum distributions from an eligible 457 plan, would the requirement that distributions be "substantially nonincreasing" (Code section 457(d)(2)©) be satisfied by using the standard account-balance-divided-by-life-expectancy approach that is used with IRAs and defined contribution plans? That method is characterized as "substantially equal," which seems like it ought to work. However, the term "substantially nonincreasing" doesn't seem to have been defined. PLR 9631034 is the only place I've found any discussion of the term.