| 1 | The contract must be signed before it becomes effective. | |
| 2 | China' s antitrust law took effect in 2008. | |
| 3 | The procurement contract needs to be signed and stamped before it takes effect. | |
| 4 | Before this contract comes into effect, it needs to be signed and sealed by both parties. | |
| 5 | I need the signature of a guarantor to make this document effective. |