The provided text outlines legal principles regarding contract performance and the remedies available for non-performance. It details the obligations of parties in a contract, including the duty to perform in good faith, and the right to demand performance. The text also describes various defenses to performance, such as simultaneous performance and insecurity, and defines different types of non-performance, including delayed, impossible, and incomplete performance. Furthermore, it explains the potential remedies for a breach, including compulsory performance, demanding damages, and contract termination, specifying the requirements and scope for each. Finally, the document touches on extinctive prescription periods for claims related to non-performance and the effect of contract termination, including the requirement to return parties to their original state.