Decreto-Lei n.° 320/90 de 15/10/1990. Altera o Decreto-Lei n.° 235/86, de 18 de Agosto (regime jurídico das empreitadas e fornecimiento do obras públicas). Diário da República I Série n.° 238 de 15/10/1990 Página 4281

This legislative act updates the legal framework governing public works contracts and the supply of materials for public infrastructure. It aims to refine the rules for how government entities procure construction services and supplies, ensuring the legal regime remains current and functional. This procedure primarily affects public administration bodies and private contractors or suppliers bidding for public works projects in Portugal.