English term (edited): under concession

z ustępstwami/odstępstwami/w ramach zezwolenia/z zastrzeżeniami
https://www.goldenline.pl/grupy/Przedsiebiorcy_biznesmeni/ja...

https://www.proz.com/kudoz/polish_to_english/it_information_...

By authorizing its use, release or acceptance under concession by a relevant authority and, where applicable, by the customer. In this case, the product still doesn't meet requirements. Nothing has been done to eliminate the nonconformity or alter the product's quality or performance. However, somebody has decided to use, release or accept the product anyway. If a product is nonconforming according to the organization's internal specifications but acceptable according to the customer's specifications, then a concession can be issued by the organization. However, if the product is nonconforming according to the customer's specifications, then the concession can only come from the customer.
https://www.bayt.com/en/specialties/q/150582/what-is-the-pro...
https://www.qualitydigest.com/mar02/html/nonconform.html

Authorize use, release or acceptance

This is often referred to as Use As Is (UAI) when you “authorize the use, release or acceptance under concession by a relevant authority and, where applicable, by the customer.” If the product or service does not fully conform to the intended requirements, but it can still be used with acceptable degraded results, then this can be approved by an appropriate person, who might be the end customer, if needed. An example might be a bracket that has three holes drilled instead of two, but the third hole does not interfere with the assembly, so the part is used because it will not affect the product.
https://advisera.com/9001academy/blog/2014/11/18/understandi...