自签约方签字盖章之日起有效的翻译：Since the date of the contract signed and sealed by an effective 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Effective since the date of the contracting parties signed and sealed

Since the date of the contract signed and sealed by an effective

Signs and seals the date effectively from the signing side

The Contracting Parties of the date signed and sealed effectively

Since the date of the contract signed and sealed by an effective