It can be used in many situations,for example:
经审定,准予毕业:it means the school has checked your information(grades,morality and so on), gives you a diploma and agree to graduation.
In the Chinese dictionary,the explanation of "审定" is "审定,指审查决定或审阅评定"(Examine the assessment or decision that has been made)
I have thought for a long time,maybe I haven't explain clearly,sorry.