X0201 3 2003-07-31 1 0000897513 ACM MUNICIPAL SECURITIES INCOME FUND INC AMU 0001253231 MANLEY MARK R C/O ALLIANCE CAPITAL 1345 AVENUE OF AMERICAS NEW YORK NY 10105 0 0 0 1 SVP/Acting GC, Fund's Adviser Mark R. Manley 2003-08-08 /s/ Mark R. Manley 2003-08-08