First of all, letters of credit are not easy to obtain these days, so that's something we would not like to have as a constraint for the 10-year amortization we are recommending.
Letters of credit, nonetheless, can be used to make the payments that would otherwise be made in the plan, or to cover the payments that would otherwise be made in the plan, and whenever the situation turned around, these payments could be made. This is one of the options that can be made available to companies in better times, because these days I think it would be difficult to use.