Article 511. The public authorities shall guarantee the protection of consumers and users and shall, by means of effective measures, safeguard their safety, health and legitimate economic interests. 2. The public authorities shall promote the information and education of consumers and users, foster their organizations, and hear them on those matters affecting their members, under the terms established by law. (…) 3. Within the framework of the provisions of the foregoing paragraphs, the law shall regulate domestic trade and the system of licensing commercial products.