ARTICLES OF INCORPORATION
INTERSTATE POWER AND LIGHT COMPANY
Pursuant to Section 1007(1) of the Iowa Business Corporation Act, these Restated Articles of Incorporation shall
supersede and take the place of the Corporation’s existing Restated Articles of Incorporation and all prior amendments thereto.
The name of the corporation is Interstate Power and Light Company.
Section 1. Authorized Capital Stock. The authorized capital stock of the Corporation shall consist of 40,000,000 shares, of
which (i) 24,000,000 shares shall be designated “Common Stock” of the par value of $2.50 each; and (ii) 16,000,000 shares shall
be designated “Preferred Stock” of the par value of $.01 each.
Section 2. Preferred Stock. Authority is hereby vested in the Board of Directors to divide the Preferred Stock into series and,
within the limitations set forth in the Iowa Business Corporation Act, to fix and determine the relative rights and preferences of
the shares of any series so established, including, without limitation:
In order to establish such series, the Board of Directors and the Corporation shall comply with the procedure therefor as
provided in the Iowa Business Corporation Act. Upon such compliance, the resolution of the Board of Directors establishing
and designating the series and fixing and determining the relative rights and preferences thereof shall become effective and
shall constitute an amendment of these Restated Articles of Incorporation.
The rights of the Common Stock of the Corporation shall be subject to the relative rights and preferences of the Preferred
Stock of each series as fixed herein and from time to time by the Board of Directors as aforesaid.
The shares of Preferred Stock may be issued for such consideration as shall be fixed from time to time by the Board of
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8.375% Series B Cumulative Preferred Stock
Section 1. Designation and Number.