The ordering contract must be signed to take effect. However, a general contract only requires a signature or a seal to be effective, unless otherwise specified in the contract.

Article 502 of the Civil Code: A contract established in accordance with the law shall take effect from the time of its establishment, unless otherwise provided by law or otherwise agreed upon by the parties.

In accordance with the provisions of laws and administrative regulations, if the contract must be approved and other procedures shall be followed. If the failure to go through approval and other procedures affects the effectiveness of the contract, it will not affect the effectiveness of the contract's obligations such as reporting for approval and the effectiveness of related clauses. If the party that should go through the application approval and other procedures fails to perform its obligations, the other party may request that it bear liability for violating such obligations.

In accordance with the provisions of laws and administrative regulations, if the modification, transfer, termination, etc. of a contract require approval and other procedures, the provisions of the preceding paragraph shall apply.