VAN KAMPEN STRATEGIC SECTOR MUNICIPAL TRUST - SERIES A CUSIP - 920-943-206
   VAN KAMPEN STRATEGIC SECTOR MUNICIPAL TRUST - SERIES B CUSIP - 920-943-305

                        NOTICE OF PROPOSED REORGANIZATION


                  NOTICE IS HEREBY GIVEN that VAN KAMPEN STRATEGIC SECTOR
MUNICIPAL TRUST ("Strategic Sector Municipal Trust") is scheduled to reorganize
into VAN KAMPEN SELECT SECTOR MUNICIPAL TRUST (the "Acquiring Fund") after the
close of business on October 7, 2005.

                  The Acquiring Fund currently has two series of remarketed
preferred shares ("RP"). After the reorganization is completed, the Acquiring
Fund will have four series of RP: (i) the Acquiring Fund's existing RP will
comprise Series A RP and Series B RP and (ii) the Acquiring Fund will issue two
new series of RP ("Acquiring Fund Series C RP" and "Acquiring Fund Series D RP")
in exchange for Strategic Sector Municipal Trust's existing auction preferred
shares ("APS") ("Strategic Sector Municipal Trust Series A APS" and "Strategic
Sector Municipal Trust Series B APS"). The number of days in the regular
dividend period for Acquiring Fund Series C RP and Acquiring Fund Series D RP
will remain the same as the existing Strategic Sector Municipal Trust Series A
APS and Strategic Sector Municipal Trust Series B APS, respectively (i.e., a
remarketing for Acquiring Fund Series C RP and Acquiring Fund Series D RP will
occur every 28 days, unless the Acquiring Fund declares a special dividend
period).

                  The previous auction for Strategic Sector Municipal Trust
Series A APS occurred on September 22, 2005. On October 7, 2005, holders of
Strategic Sector Municipal Trust Series A APS will receive i) a dividend
representing the fifteen day period from September 23, 2005 through October 7,
2005 and ii) one Acquiring Fund Series C RP in exchange for each share of
Strategic Sector Municipal Trust Series A APS. The initial dividend rate for the
Acquiring Fund Series C RP will be the rate as determined at the September 22,
2005 auction for Strategic Sector Municipal Trust Series A APS, and this rate
will continue until the next regularly scheduled remarketing for Acquiring Fund
Series C RP, which is expected to be on October 20, 2005 (i.e., 28 days after
September 22, 2005).

                  The previous auction for Strategic Sector Municipal Trust
Series B APS occurred on September 23, 2005. On October 7, 2005, holders of
Strategic Sector Municipal Trust Series B APS will receive i) a dividend
representing the twelve day period from September 26, 2005 through October 7,
2005 and ii) one Acquiring Fund Series D RP in exchange for each share of
Strategic Sector Municipal Trust Series B APS. The initial dividend rate for the
Acquiring Fund Series D RP will be the rate as determined at the September 23,
2005 auction for Strategic Sector Municipal Trust Series B APS, and this rate
will continue until the next regularly scheduled remarketing for Acquiring Fund
Series D RP, which is expected to be on October 21, 2005 (i.e., 28 days after
September 23, 2005).

                  The foregoing does not constitute an offer of any securities
for sale. The proxy statement/prospectus relating to the proposed reorganization
contains important information and shareholders are urged to read it. Free
copies of the proxy statement/prospectus are available by calling Van Kampen's
Client Relations Department at (800) 341-2929 or on the Securities and Exchange
Commission's web site at www.sec.gov.



                                       VAN KAMPEN STRATEGIC SECTOR MUNICIPAL
                                       TRUST


Dated:  September 30, 2005             By: /s/ PHILLIP G. GOFF
                                         ---------------------
                                           Phillip G. Goff
                                           Chief Financial Officer and Treasurer