Conformed Copy - L4175 - Greater Tunis Sewerage and Re-use Project - Supplemental Letter 3

Page 1 OFFICE NATIONAL DE L’ASSAINISSEMENT December 19, 1997 International Bank for Reconstruction and Development 1818 H Street, N.W. Washington, D.C. 20433 United States of America Re: Loan No. 4175 TUN (Greater Tunis Sewerage and Re-use Project) Performance Indicators Sections I and II of Schedule 5 to the Loan Agreement Dear Sirs and Mesdames: We refer to the Performance Indicators to be utilized by the Office National de l’Assainissement (the Borrower) pursuant to the provisions of Sections I and II of Schedule 5 to the Loan Agreement of even date herewith between the International Bank for Reconstruction and Development (the Bank) and the Borrower to measure the progress in the carrying out of Part A of the Project and the degree to which the objectives thereof are being achieved. We hereby confirm that said Indicators shall consist of the parameters set forth in the Attachment to this Letter. Very truly yours, OFFICE NATIONAL DE L’ASSAINISSEMENT By /s/ Noureddine Majdoub Authorized Representative AGREED AND CONFIRMED: INTERNATIONAL BANK FOR RECONSTRUCTION AND DEVELOPMENT By /s/ Gianni Brizzi Acting Regional Vice President Middle East and North Africa Attachment