Commercial policy clause requiring that all or specific protections agreed at the commencement of the policy be maintained in full and efficient working order throughout the currency of the policy. If the clause is interpreted as a warranty, the cover terminates from the date of breach and the insurer does not have to show a cause and effect relationship between a breach and a loss. In some instances the breach has been held to be a suspension of cover so that when compliance is resumed subsequent losses will be covered. See DESCRIPTION OF RISK CLAUSE.