Since it was approved in 2007, law 30/2007 on Public Sector contracts has undergone several modifications that require a commitment from responsible for public employees in the processing of dossiers. Since adoption in 2007, the Public Sector Contracts Act has undergone several modifications that require a significant commitment from responsible for public employees in the processing of dossiers. From the own law, which was completing some of the least developed in the same points, up small amendments, as the variation of the thresholds in the procurement amounts, have supposed a continuous coming and going the requirements necessary to carry out engagements and maintain parameters of perfection posed by the European directive on contracts from the beginning. With the adoption of the new law 34/2010 of 5 August, substantially amending certain paragraphs pertaining to law 30/2007 on Public Sector contracts, as well as the law 31/2007 concerning procurement procedures in the sectors of water, energy, transport and postal services. The motivation, to approve a new law related to public procurement in our country, lies in the need to adapt the existing rules of contracts to European directive resource and, thus, alleviate the defects that, until now, hiring records presented in the regulation of special resources. Among the defects detected by the State Council on April 29, 2010, is the impossibility of challenging acts subsequent to the interim award, the little term offered to tenderers not bidders to appeal and the lack of an independent body, to the contracting body, to which to submit resources. Taking into account the above-mentioned precedents, arises a reform of the Act whose purpose is the allow tenderers who participate in the procurement procedure, to have more chances of getting an effective resolution and transparent suede the appeals. Law 34/2010 of 5 October, amending previous laws to achieve the aforementioned reform, directly affects the selection of providers, referred to as far as the interposition of special resources; that is, the award and the formalization of contracts as well as the deadlines associated with those acts.