as the case may be and each of which are hereinafter reffered to; shall govern your order gen.

[Anetta]

Добрый вечер!
Помогите, пожалуйста, грамотно перевести эти фразы:
as the case may be and each of which are hereinafter reffered to.... и
... shall govern your order

Это из счета на оплату:

Unless otherwise expressly and previously agreed to in a separate written Agreement, the attached XXX Company Terms and Conditions of Sale (as the case may be and each of which are hereinafter reffered to as "XXX Terms and Conditions of Sale"), are incorporated into this document by reference and shall govern your order.

Заранее большое спасибо!