Project designation under tax exemption law extends eligible status for a charitable public health scheme for three assessment years. Central Government specifies the preventive diagnosis, curative medical aid and mass awareness programmes run by a charitable trust in slums of Bombay and Adivasi and other villages of Thane, Raigarh and Nasik as an eligible project or scheme under the tax exemption provision; following the National Committee's recommendation that the scheme is properly executed, the project is specified for a further three assessment years commencing with the assessment year 1999 2000 at an estimated project cost.