text: By 26 July 1993, existinq key stations in rapid, light, and commuter rail systems must be made accessible with extensions of up to 20 years (30 years, in some cases, for rapid and light rail). E/CN.4/Sub.2/1990/NGO/30 paqe 3 C. Privately operated bus and van companies The ADA requirements become effective on: 26 January 1992, qenerally. - 26 July 1996 (26 July 1997, for small providers) for purchase of new over-the-road buses. - 26 Auaust 1990, for purchase or lease of certain new vehicles (other than over-the-road buses). IV. State and local government operations The ADA reauirements become effective on: - 26 January 1992. V. Telecommunications The ADA requirements become effective on: 26 July 1993, for provision of relay services. This document is available in the following accessible formats: - Braille - Larqe print - Audiotape - Electronic file on computer disk and electronic bulletin board (202) 514-6193 For more information on the ADA contact: United States Department of Justice Civil Rights Division Co-ordination and Review Section P.O. Box 66118 Washinaton D.C. 20035-6118 (202) 514-0301 (Voice) (202) 514-0381 (TDD) (202) 514-0383 (TDD) 
analysis: The text appears to be related to the implementation of the Americans with Disabilities Act (ADA) in the United States, specifically regarding accessibility requirements for public transportation, telecommunications, and state and local government operations. This suggests that the category should be related to the transport and communication sector.