E-7 Exhibit Designation Nature of Exhibit Previously Filed as Exhibit to: *23 Consent of PricewaterhouseCoopers LLP. *24 Power of Attorney. *31(a) Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *31(b) Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. *32(a) Certification of Chief Executive Officer Pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code. *32(b) Certification of Chief Financial Officer Pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code. 101.INS XBRL Instance Document. The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document. 101.SCH XBRL Taxonomy Extension Schema. 101.CAL XBRL Taxonomy Extension Calculation Linkbase. 101.DEF XBRL Taxonomy Extension Definition Linkbase. 101.LAB XBRL Taxonomy Extension Label Linkbase. 101.PRE XBRL Taxonomy Extension Presentation Linkbase. 104 Cover Page Interactive Data File. Formatted as inline XBRL and contained in Exhibit 101. APCo‡ File No. 1-3457 3(a) Composite of the Restated Articles of Incorporation of APCo, amended as of March 7, 1997. 1996 Form 10-K, Ex 3(d) 3(b) Composite By-Laws of APCo, amended as of February 26, 2008. 2007 Form 10-K, Ex 3(b)