Pu (符, also referred as fu) originally indicated the documents of orders and instructions that government agencies gave to their lower rank agencies, which meant that any agencies, including Daijokan, were able to issue it, but because Daijokan, in principle, was able to issue it to all the other agencies and the important laws like Kyakushiki (supplementary laws of Ritsuryo code) were sometimes issued in the form of Daijokanpu, it was taken very seriously.
符とは、元来官庁が自己の管轄下にある下位の官庁に出す命令文書を指し、太政官以外の官庁でもこれを出すことが出来たが、太政官は原則として他の全ての官庁に対して符が出せたこと、格式のような重要な法令も太政官符の書式を用いて出されることがあったことから、極めて重みを有した。