One third of the file. Because the use of the official seal must conform to the format specification, the controlled seal is also a kind of official seal, and the seal is based on the format requirements of government official document processing. The seal of the controlled document is stamped at one third of the height of the document, which meets the requirements of the official document, that is, under the signature of the compiler, reviewer and approver. If the page has a controlled state, it will be overwritten in the controlled state position.