Cal. Gov. Code § 56883

The executive officer may, before the completion of a proceeding, on good cause being shown, correct clerical errors or mistakes made through inadvertence, surprise, or excusable neglect that may be contained in the resolution adopted by the commission making determinations, upon written request by any member of the commission, by the executive officer, or by any affected agency. A correction made pursuant to this section shall not be cause for filing a request pursuant to Section 56895.