This excerpt taken from the ETH 8-K filed Sep 21, 2005.
Restriction on Sale-Leasebacks
Our parent company will not, and will not permit any restricted subsidiary to, enter into any sale and leaseback transactions on any principal property except:
(1) leases in a sale and leaseback transaction incurred when our parent company or such restricted subsidiary could incur a lien on such principal property securing debt in an amount equal to the value of such sale and leaseback transaction under the covenant described in "Limitation on Liens" above without equally and ratably securing the notes and guarantees, if applicable; or
(2) if our parent company or such restricted subsidiary applies, during the six months following the effective date of the sale and leaseback transaction, an amount equal to the value of the sale and leaseback transaction to the voluntary retirement of long-term indebtedness or to the acquisition of principal property.