Common use of Mandatory Sinking Fund Redemption Clause in Contracts

Mandatory Sinking Fund Redemption. The Bonds are subject to mandatory sinking fund redemption on the Interest Payment Date occurring in the month of January in each of the years set forth below commencing on the Interest Payment Date occurring in January of 2000 (each, a "Mandatory Sinking Fund Payment Date"), at a redemption price equal to 100% of the principal amount thereof plus accrued interest as follows: Mandatory Sinking Year Fund Payments ---- ----------------- 2000 $560,000 2001 $560,000 2002 $560,000 2003 $560,000 2004 $560,000 2005 $560,000 2006 $560,000 2007 $560,000 2008 $560,000 2009 $575,000 2010 $580,000 2011 $580,000 2012 $580,000 2013 $145,000* *Final maturity of the Bonds is January 1, 2013

Mandatory Sinking Fund Redemption. The Bonds are subject to mandatory sinking fund redemption on the Interest Payment Date occurring in the month of January May in each of the years set forth below commencing on the Interest Payment Date occurring in January on June 3 of 2000 1998 (each, a "Mandatory Sinking Fund Account Payment Date"), at a redemption price equal to 100% of the principal amount thereof plus accrued interest as follows: BONDS Mandatory Sinking Year Fund Account Payments ---- ----------------- 1999 $125,000.00 2000 $560,000 120,000.00 2001 $560,000 125,000.00 2002 $560,000 130,000.00 2003 $560,000 140,000.00 2004 $560,000 150,000.00 2005 $560,000 155,000.00 2006 $560,000 165,000.00 2007 $560,000 175,000.00 2008 $560,000 185,000.00 2009 $575,000 195,000.00 2010 $580,000 205,000.00 2011 $580,000 220,000.00 2012 $580,000 230,000.00 *2013 $145,000* 245,000.00 *Final maturity of the Bonds is January 1, 2013maturity

Mandatory Sinking Fund Redemption. The Bonds are subject to mandatory sinking fund redemption on the Interest Payment Date occurring in the month of January May in each of the years set forth below commencing on the Interest Payment Date occurring in January May of 2000 2003 (each, a "Mandatory Sinking Fund Account Payment Date"), at a redemption price equal to 100% of the principal amount thereof plus accrued interest as follows: Mandatory Sinking Year Fund Account Payments ---- ----------------- 2000 $560,000 2001 $560,000 2002 $560,000 ---------------- 2003 $560,000 535,000 2004 $560,000 810,000 2005 $560,000 655,000 2006 $560,000 690,000 2007 $560,000 105,000 2008 $560,000 110,000 2009 $575,000 115,000 2010 $580,000 125,000 2011 $580,000 130,000 2012 $580,000 135,000 2013 $145,000140,000 2014* $150,000 *Final maturity of the Bonds is January 1, 2013maturity

Mandatory Sinking Fund Redemption. The Bonds are subject to --------------------------------- mandatory sinking fund redemption commencing April 1, 1997 and on each April 1 thereafter and the Interest Payment Date occurring November 1 prior to maturity in the month of January in each of the years principal amounts set forth below commencing on the Interest Payment Date occurring in January of 2000 (each, a "Mandatory Sinking Fund Payment Date"), below. All such redemptions shall be at a redemption price equal to of 100% of the principal amount thereof thereof, without premium, plus accrued interest as follows: Mandatory Sinking Year Fund Payments ---- ----------------- to the redemption date. APRIL 1 AMOUNT APRIL 1 AMOUNT 1997 $115,000 2003 $220,000 1998 $125,000 2004 $315,000 1999 $190,000 2005 $315,000 2000 $560,000 190,000 2006 $315,000 2001 $560,000 190,000 2007 $315,000 2002 $560,000 2003 $560,000 2004 $560,000 2005 $560,000 2006 $560,000 2007 $560,000 2008 $560,000 2009 $575,000 2010 $580,000 2011 $580,000 2012 $580,000 2013 $145,000* *Final maturity of the Bonds is January 190,000 NOVEMBER 1, 2013$185,000 2007