Decreto-lei n° 290-A/99 de 30 de julho. Diario da Republica, 30/07/1999, n° 176, 4934. SG(99)A/11500.

This Portuguese Decree-Law, published in the Official Gazette on July 30, 1999, establishes rules related to public procurement procedures. It aims to regulate how public entities acquire goods, services, and works. This legislation affects public administrations and companies involved in public tenders, as well as economic operators bidding for public contracts within Portugal.