в контракте должна быть прописана о

в контракте должна быть прописана общая сумма по контракту.
И в случае предоплаты в какие сроки будет поставлен товар (но не более 179 дней),
этот срок должен быть с запасом, на случай непредвиденных задержек,
т.к. все авансовые платежи подлежат особому валютному контролю

Результаты (английский) 1:

the contract must be specified, the total amount of the contract.And in the case of prepayment within what period of time will be delivered the goods (but not more than 179 days)This period should be more than enough, in case of unforeseen delays,because all payments are subject to a special currency control

Результаты (английский) 2:

the contract should be spelled out the total amount of the contract.
And in the case of pre-paid at what time will be delivered the goods (but not more than 179 days),
this period should be a margin for unforeseen delays,
because All advance payments shall be subject to a special foreign exchange control

Результаты (английский) 3:

in the contract should be spelled out, the total amount of the contract. in case of prepayment
and in what time frame would be delivered the goods, but not more than 180 days),
this term should be more, in case of unforeseen delays,
t.all advance payments are subject to specific monetary control.