信用证上 46A 有些条款不是很明白,不知道怎么操作:4-COPY OF BENF TELEX OR FAX SENT TO OUR PRINCIPAL OT LATER THAN (7)W.DAYS AFTER SHIPMENT STATING B/L NO. L/C NO. NAME OF VESSELL DATE OF SHIPMENT VALUE AND QUANTITY OF GOODS SHIPPE7- BENEF. CERTIFICATE EVIDENCING THAT COPY OF ALL DOCS REQUIRED HAS BEEN DISPATCHED TO BUYER'S ADD. WITH IN THREE WORKING DAYS FROM B/L DATE这里第4条,说把复印件电传或传真到他们的 PRINCIPAL, 这里PRINCIPAL 是指谁呀? 是不是交单的时候自己出份文件,说已经这样做了就可以了?第7条说要在提单日期三天内把需要的文件的COPY件快递给买方,我们三天内还不一定能收到提单呢。这个是一定要这样做吗?还是像第4条一样,也自己出份文件说明已经这样做了。请教高人指点,谢谢!