1 EXHIBIT 3(b) AMENDMENTS 1ST SOURCE CORPORATION 04-16-98 Article 4, Section 4.01. Duties and Number, amended. RESOLUTION OF BOARD OF DIRECTORS OF 1ST SOURCE CORPORATION APRIL 16, 1998 RESOLVED, that the By-Laws of this Corporation shall be amended at Article 4 (Board of Directors), Section 4.01 (Duties and Number), by deleting in its entirety the last sentence thereof, which states: "In the absence of a resolution by the Board fixing or changing the number of Directors, the number shall be eleven (11)", because this Board has determined on the advice of counsel that such action is not required by law or regulation.