amortization schedule as if the first payment is made out of order, and as if each successive payment is made on the anniversary of the date of withdrawal.)
*428 We recognize that Congress might have been more specific. For example, it could have said: "Calculate amortization as if the first payment is made on the date the employer's withdrawal liability is due" (had it intended interest to start accruing on that date); or: "Calculate amortization as if each payment is made on the last day of the year at the beginning of which it is due" (had it intended interest to start accruing one cycle before the first payment is due). Instead, Congress said that one should calculate amortization "as if the first payment were made on the firstrule for calculating funding shortfalls has nothing to do with interest").
Third, the Plan points to legislative history. The Plan says that the original bill provided that interest would not begin accruing until the date of withdrawal. And, the Plan points out, just like the version that ultimately became law, the bill located the valuation date (the date as of which the withdrawing employer's share in the plan's under funding is determined) at the end of the plan year before withdrawal. Thus, the Plan says, the original bill contemplated a "funding gap"from the valuation date to the withdrawal date. Because the section providing that interest started accruing on the withdrawal date did not make it into the statute as enacted, *429 the Plan argues, Congress expressly rejected the idea