The most recent changes in the economy at international and national level imply several challenges for society, especially for the legal framework that regulates adjudication procedures for public contracts. This work presents a panoramic vision on the main tendencies in the juridical theories and in the comparative Law in Iberoamerica, and it demonstrates the existence of inadequacies in the Cuban legislation that regulates the procedures to celebrate bids which do not allow them to adequately face the current and future challenges, particularly the prevention and confrontation to administrative corruption, the search for efficiency in the use of the public funds, and the necessary opening to foreign investment and the international trade.