Lei n° 11/2004 de 27/03/2004 Diario da Republica I Serie A n° 74 de 27/03/2004 p. 1980

This law establishes the legal framework for public procurement in Portugal, governing how public authorities award contracts for goods, services, and works. It aims to ensure transparency, competition, and efficiency in the use of public funds. It affects public administrations, companies bidding for public contracts, and ultimately, taxpayers by influencing the cost and quality of public services and infrastructure.