each of the parties have caused this agreement to be executed by its duly authorized representative

each of the parties have caused this agreement to be executed by its duly authorized representative
each of the parties have caused this agreement to be executed by its duly authorized representative

each of the parties have caused this agreement to be executed by its duly authorized representative
each of the parties have caused 应为each of the parties has caused 吧.

每一方都必须执行这个协议所造成的正式授权代表

由正式授权代表认可的每一方须严格执行此协定。

每一方都必须由正式授权代表来执行这个协议

履行这一协议必须的任一方必须得到适时的具有权威的授权

每个党导致了这个协议由它的适当授权代表执行