All invoices will be in US dollars except where another currency is specifically agreed and are payable on delivery (or such other date as may be stated in the Engagement Letter). Any query on an invoice must be raised within 7 days of delivery.

delivery относится к услугам -- delivery of services, то есть: подлежат оплате по факту предоставления услуг, или смысл другой --по получении счета?

Заранее спасибо