《睡虎地秦墓竹简·秦律十八种·仓律》
由县啬夫或丞和仓、乡主管人员共同封缄，而给仓啬夫和乡主管稟给的仓佐各一门，以便发放粮食，由他们独自封印，就可以出仓，到仓中没有剩余时才再给他们开另一仓门。
縣嗇夫若丞及倉、鄉相雜以印之，而遺倉嗇夫及離邑倉佐主稟者各一戶以氣，自封印，皆輒出，餘之索而更為發戶。
The county serf or assistant magistrate and the granary and township supervisors shall seal it together, and each of the granary serfs and township supervisors shall be given one gate for distributing grain; they shall seal it independently, and when the granary is empty, another granary gate shall be opened for them.