Article 307. The concept of the obligation and the grounds for its occurrence.
1. By virtue of an obligation, one person (debtor) is obliged to perform a certain action in favor of another person (creditor), such as: transfer property, do work, pay money, etc., or refrain from certain action, and the creditor has the right to demand from the debtor of his duties. 2. Obligations arise from a contract, as a result of causing harm and from other grounds specified in this Code.
References to other articles of chapter 21. The concept and the parties to the obligation: