помогите с договором

[yavrum]

3. Исполнитель обязуется представлять интересы Заказчика при проведении таможенного оформления в пользу Заказчика
1. Заказчик поручает, а Исполнитель принимает к исполнению услуги по таможенным формальностям в пользу Заказчика

[kintorov]

The Contractor shall represent/act on behalf of the Customer for customs clearance (purposes) for the benefit of the Customer.

The Customer is willing and the Contractor commits to provide/render custom clearance services for the benefit of the Customer.

IMHO

[Deserad]

Предлагаю "в пользу" - in favour of
поручать - charge/entrust with

[Deserad]

assumes to вместо commits to ИМХО

[kinsman]

имхо:
Customer hereby engages Contractor and Contractor agrees/undertakes to provide customs clearance services in favor of Customer.

[Nina79]

3. Contractor shall act on behalf of the Customer during all customs operations???

[ms801]

Also consider for item 3:

Customer hereby comissions Contractor, and Contractor accepts such comission for custom clearance services....