It is agreed and understood that, notwithstanding the terms, exclusions, provisions and conditions of the Policy or any Endorsements agreed upon and subject to the Insured having paid the agreed extra premium, Section 1 of the Policy shall be extended to cover loss of or damage to property insured (except property being manufactured, processed or stored at the manufacturer's, distributor's or supplier's premises) in off-site storage within the territorial limits as stated below.