EX-20 	INTERSTATE POWER COMPANY 	DIVIDEND REINVESTMENT AND STOCK PURCHASE PLAN 	AUTHORIZATION FORM [ ] [ ] I hereby appoint Interstate Power Company as agent under the terms and conditions of the Interstate Power Company Dividend Reinvestment and Stock Purchase Plan as described in the Prospectus received by me to (Please Check One Option Only): 	FULL DIVIDEND REINVESTMENT - I wish to reinvest dividends on ALL registered shares of Stock held in the account shown. ($ enclosed) The dividends on all shares registered in your name and dividends on Common Stock shares credited to your account under the Plan will automatically be reinvested in additional shares of Common Stock. With this option you may also make Optional Cash payments (see description below). 	PARTIAL DIVIDEND REINVESTMENT - I wish to reinvest dividends on shares of stock. ($ enclosed) If you are holding certificated shares, you may designate the number of certificated shares for which the quarterly Dividend will be paid to you by check or electronic deposit. The balance of the Dividend on your certificated shares will be reinvested. If your shares are held in book-entry form, you may designate the number of shares for which you would like to receive a Dividend by check or electronic deposit. The quarterly Dividend for the balance of your Plan shares will be reinvested. With this option you may also make Optional Cash payments (see description below). 	OPTIONAL CASH PAYMENTS ONLY - I wish to make ONLY optional cash payments to the Plan. ($ enclosed) You may make optional cash payments at any time; however, the Company only makes purchases once per month. Since no interest will be paid on amounts held by the Company for stock purchase, we suggest cash payments be mailed to reach our office no later than 10 days prior to the investment date, usually the 20th of the month, if a business day, or, if not, the next business day. The amount of each cash payment must be at least $25, and the total cash payment may not exceed $2,000 per month. Dividends on shares purchased will automatically be reinvested in additional shares of Common Stock. 	over 	SHARE SAFEKEEPING ONLY - I wish to receive cash dividends for book-entry shares. ($ enclosed) Dividends on common shares held in book-entry form are paid to you by check or electronic deposit. With this option you may also make Optional Cash payments (see other side for description). 	CUSTOMER STOCK PURCHASE - I wish to enroll in the Dividend Reinvestment Plan. ($ enclosed) You must be a residential or farm customer of Interstate Power Company to enroll in this portion of the plan. With this selection you can make Optional Cash payments (see description above). Dividends on shares purchased will automatically be reinvested in additional shares of Common Stock. If you are enrolling as a Customer, you must provide us with the account number from your Interstate Power Company utility bill and your social security number as well as an initial payment of at least $50.00. IPC ACCT # Social Security # Stockholder Signature Date Stockholder Signature Date Stockholder Signature Date NOTE: ALL PERSONS WHOSE NAMES APPEAR ABOVE MUST SIGN THIS FORM. RETURN THE SIGNED AUTHORIZATION FORM IN THE ENVELOPE PROVIDED TO: 	STOCKHOLDER SERVICES DEPARTMENT 	INTERSTATE POWER COMPANY 	1000 MAIN ST 	PO BOX 769 	DUBUQUE IA 52004-0769 	(319) 557-2230 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # FOR OFFICE USE ONLY # # # # HOLD TILL CERT REISSUED # # # # SET UP NEW ACCOUNT # # # # TRANSFER FROM: # # # # ENROLLED: # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #