The civil contract was concluded at the moment when the contracting parties agreed on the essential components of the contract. If one of the contracting parties is obliged to conclude a contract, the interested party may request that such a contract be concluded without delay. The provisions of the regulations which partially or completely regulate the content of the contract, are integral parts of the contract, and complement them, ie replace those contractual provisions that are not in accordance with them. The will to enter into a contract may be expressed in words, signs, and other means of conduct and means of communication, but it must be done seriously and freely, and if the conclusion of a contract requires the consent of a third party, it may be given or as consent. before the conclusion of the contract, or as an approval, after the conclusion of the contract, unless otherwise provided by law. Whether it is a consent or an approval, it must be given in the form prescribed for the contracts for which they are concluded.