Rewritten means written out again in a changed form. Heavily rewritten, a rewritten draft, the rules were rewritten.
It is the past participle of rewrite, and rules described as rewritten are what anybody says of a change to how something is done. In writing it is the whole craft, since almost nothing worth reading was written once.
1adjectiverewrittenWritten out again in a changed form.
“The rewritten version of the song was slower and sadder than the original.”
rewritten is a state.