(a) This section applies only to final versions of the following documents that are in effect:      
        (1) rules;       
        (2) other written statements of policy or interpretations that are prepared, adopted, or used by the agency in discharging its functions;       
        (3) orders;       
        (4) decisions; and       
        (5) opinions.       
      (b) For the purposes of this section, the following words or phrases shall have the following meanings.      
        (1) Index - To produce or furnish, as an aid in making documents accessible to the public, one or more of the following:                  (A) a table of contents;                   (B) a current list of the titles, identifying names, or identifying numbers of the documents;                   (C) an orderly filing system by which those documents may be retrieved; or                   (D) an electronic database of documents by which at least the titles, identifying names, or identifying numbers of those documents can be searched.         
        (2) Cross-index to statute -                  (A) For rules: to cross-reference or cite statutory authority, for proposing or adopting the rule, according to the requirements of the APA,                     Texas Register                    rules, and other applicable law.                   (B) For written statements of policy or interpretations that are prepared, adopted, or used by the agency in discharging its functions, orders, decisions, and opinions: to cross-reference or cite statutory or regulatory authority within the document.         
      (c) The agency shall index, cross-index to statute, and make available for public inspection the following:      
        (1) rules;       
        (2) other written statements of policy or interpretations that are prepared, adopted, or used by the agency in discharging its functions;       
        (3) orders;       
        (4) decisions; and       
        (5) opinions.       
     Source Note:        The provisions of this §20.4 adopted to be effective April 18, 2002, 27 TexReg 3191