"One change is to permit the 133% rule of Sec. 411(b)(1)(B) for defined benefit plans that adjust benefits using a variable rate that could be negative to be applied at an earlier date than originally proposed, either for plan years that begin on or after Jan. 1, 2012, or an earlier date elected by the taxpayer.... Related proposed regulations issued simultaneously concern the rules under which a hybrid plan is treated as failing to satisfy Sec. 411(b)(1)(H) (which prohibits the rate of an employee' s benefit accrual from being reduced because of the attainment of any age) if the terms of the plan provide any interest credit (or an equivalent amount) for any plan year at a rate that is in excess of a market rate of return."