Where any right, duty, or liability would arise under a contract of marine insurance by implication of law, it may be negatived or varied by express agreement, or by usage, if the usage by such as to bind both parties to the contract 海上保险合同因法律的默示而产生的权利、义务或责任,均可通过双方明文协议或依据双方都能接受并受其约束的习惯否定或修改之。