What it provides is that the lease will be subject and subordinate to all underlying leases and mortgages affecting the property. What this means is that if, for example, the owner of a shopping center is also the lessee of the entire shopping center under a ground lease and then defaults so that the ground lease is terminated, then all leases covering the individual stores will be terminated as well. That is quite a perilous position for a business owner to be in. Similarly, if the landlord is the owner of the property, but has a mortgage on the property and subsequently defaults on the mortgage, then the tenant’s lease will be subject to foreclosure by the bank. In many cases, the lessor cannot remove this clause because there is a ground lease or mortgage in place which requires that the clause be included in all leases, however the clause can be modified to afford some protection to the tenant without any substantial adverse effect on the lessor.