Any liability of the Assured in connection with any tenant of the Assured for Operations performed by any sub-contractor appointed by the Assured, but being subject to the terms, conditions and exclusions of this Policy. It is a condition of cover being given under this clause 2.3 that the Assured must ensure that any such tenant and/or sub-contractor purchases and maintains adequate liability insurance. Adequate insurance means terms no less favourable than the cover provided to the Assured under this Policy. Such policy must also stipulate that it will respond first to any liability loss prior to any other policy of insurance which may cover the same liability.