UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-PX ANNUAL REPORT OF PROXY VOTING RECORD OF REGISTERED MANAGEMENT INVESTMENT COMPANY Investment Company Act file number 811-5597 ---------------------------------------------- Morgan Stanley Municipal Income Opportunities Trust -------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 1221 Avenue of the Americas, New York, New York 10020 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Amy Doberman, Esq. Managing Director Morgan Stanley Investment Advisors Inc. 1221 Avenue of the Americas New York, New York 10020 -------------------------------------------------------------------------------- (Name and address of agent for service) Registrant's telephone number, including area code: 800-869-6397 ----------------------------- Date of fiscal year end: 5/31 ---------------------- Date of reporting period: 7/1/05 - 6/30/06 --------------------- ******************************* FORM N-Px REPORT ******************************* ICA File Number: 811-05597 Reporting Period: 07/01/2005 - 06/30/2006 Morgan Stanley Municipal Income Opportunities Trust The Registrant held no securities during the period July 1, 2005 through June 30, 2006 which required proxy votes and therefore there are no voting records to report. ========== END NPX REPORT SIGNATURES Pursuant to the requirements of the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant): Morgan Stanley Municipal Income Opportunities Trust --------------------------------------------------- By (Signature and Title): /s/ Ronald E. Robison President and Principal Executive Officer - Office of the Funds --------------------------------------------------------------- Date August 28, 2006 ----------------- 2