<PAGE>
EXHIBIT NO. 99.1(l)
MFS INSTITUTIONAL TRUST
MFS INSTITUTIONAL CORE FIXED INCOME FUND
Pursuant to Section 6.9 of the Amended and Restated Declaration of Trust
dated January 24, 1996, as amended, (the "Declaration"), of MFS Institutional
Trust (the "Trust"), the undersigned, constituting a majority of the Trustees of
the Trust, do hereby certify that MFS Institutional Core Fixed Income Fund, a
series of the Trust, has been terminated.
IN WITNESS WHEREOF, a majority of the Trustees of the Trust have executed
this redesignation of series this 3rd day of October, 2000.
JEFFREY L. SHAMES
-----------------------------
Jeffrey L. Shames
38 Lake Avenue
Newton, MA 02159
NELSON J. DARLING, JR.
-----------------------------
Nelson J. Darling, Jr.
74 Beach Bluff Avenue
Swampscott, MA 01907
WILLIAM R. GUTOW
-----------------------------
William R. Gutow
3 Rue Dulac
Dallas, TX 75230
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EXHIBIT NO. 99.1(l)
MFS INSTITUTIONAL TRUST
MFS INSTITUTIONAL EMERGING MARKETS DEBT FUND
Pursuant to Section 6.9 of the Amended and Restated Declaration of Trust
dated January 24, 1996, as amended, (the "Declaration"), of MFS Institutional
Trust (the "Trust"), the undersigned, constituting a majority of the Trustees of
the Trust, do hereby certify that MFS Institutional Emerging Markets Debt Fund,
a series of the Trust, has been terminated.
IN WITNESS WHEREOF, a majority of the Trustees of the Trust have executed
this redesignation of series this 3rd day of October, 2000.
JEFFREY L. SHAMES
------------------------------
Jeffrey L. Shames
38 Lake Avenue
Newton MA 02459
NELSON J. DARLING, JR.
------------------------------
Nelson J. Darling, Jr.
74 Beach Bluff Avenue
Swampscott MA 01907
WILLIAM R. GUTOW
------------------------------
William R. Gutow
3 Rue Dulac
Dallas TX 75230
