Sentence:  Commission Rules of Practice 231(b) and 230(h) provide that, even if Respondents were entitled to the information sought, which we do not find that they were, no rehearing or <WSD>redecision</WSD> of a proceeding already heard or decided is required, unless Respondents establish that the Division's failure to make a document available or to turn over a statement was not harmless error. 
Meaning of the word marked with <WSD> tags:  The act or result of redeciding.