The proposal is centred around financially strong companies. The ability to use a letter of credit provides a security for the pension plan. Also, as you say, letters of credit can be revoked. The financial health of the particular plan sponsor will dictate whether or not that plan sponsor is able to put a letter of credit in place. Again, this proposal is based on the scenario where you have a financially strong plan sponsor that has the credit facilities in place to put up the letter of credit, which means they're not putting the money into the pension plan, which at some point in the future--
On April 23rd, 2009. See this statement in context.