(a)  Promptly, upon the reasonable request of the Administrative Agent or the Collateral Agent, at the Companies’ expense, execute, acknowledge and deliver, or cause the execution, acknowledgment and delivery of, and thereafter register, file or record, or cause to be registered, filed or recorded, in an appropriate governmental office, any document or instrument supplemental to or confirmatory of the Security Documents or otherwise reasonably deemed by the Administrative Agent or the Collateral Agent necessary or desirable for the continued validity, enforceability, perfection and priority of the Liens on the Collateral covered thereby subject to no other Liens except Permitted Liens, or (subject to any limitations in the Security Documents) obtain any consents or waivers as may be necessary or appropriate in connection therewith.