Suru verb - special class, Transitive verb
to affix; to append; to attach
真相は絶対秘密に付されている。The truth of the matter is kept absolutely secret. to entrust; to refer; to handle (as such)
Suru verb - special class, Intransitive verb
to follow (the leader)
Suru verb - special class, Transitive verb
to submit (a document, etc.)
Also written 附する【ふする】