"The [Pension Rights] Center believes that the SPD collection is still of great value for pension plan participants and beneficiaries and, for that reason EBSA should continue to maintain as much of the collection as possible. However because it appears EBSA is proceeding with its plan to dispose of the [existing SPD collection, which covers plan years from 1975 through 1997], we also ask that EBSA ... [issue] guidance clarifying the remedies available when plans fail to retain plan documents as required [by ERISA]."