NEW YORK (Standard&Poor's CreditWire) Dec. 13, 1999 – Standard&Poor's today affirmed the ratings on 24 Landesbank Hessen-Thüringen Girozentrale LOC-backed municipal issues and placed them on CreditWatch with negative implications. (See list below) This action follows the Dec. 7, 1999, placement of Landesbank Hessen-Thüringen Girozentrale entities rating on CreditWatch with negative implications, Standard&Poor's said. – CreditWire 24 LANDESBANK HESSEN-THÜRINGEN GIROZENTRALE LOC-BACKED MUNICIPAL ISSUES Issuer/Issue Amt($mil) Rating Austin Combined Utilities, Texas Taxable CP notes 60.00 A-1+ Buffalo, N.Y. Revenue anticipation notes series 1999/2000A 40.00 SP-1+ Chicago, IL GO tender notes series 2000A 188.00 SP-1+/A-1+ Los Angeles County Metropolitan Transportation Authority, CA Proposition C sales tax revenue tax CP notes series A 150.00 A-1+ Massachusetts Health and