3. Where the law requires that a communication or a contract should be signed by a party, or provides consequences for the absence of a signature, that requirement is met in relation to an electronic communication if:
三、凡法律要求一项通信或一项合同应当由当事人签字的，或法律规定了没有签字的后果的，对于一项电子通信而言，在下列情况下，即满足了该项要求：