English to Polish Law/Patents Law: Contract(s)

jak to zgrabnie sformułować? Prosze o pomoc. Tekst jest po angielsku ale pisany przez Belgów. Bank x zakupuje maszyny od dostawcy i nastepnie oddaje je w leasing.

Całe zdanie:
The lessee will juridically be subrogated in the rights and obligations of x before the supplier, except for the advance x might have paid to the supplier, and for which the latter will be held responsible to refund to the former.