Does it state something along the lines of return to pre-accident condition or words to that effect?
There is an article here that may be of interest:
Second-hand parts are rarely used on insurance repairs but that might change. David Williams, Managing Director of Underwriting and Technical Services at AXA Insurance, points to two potential factors.
atfpro.co.uk
The use of used parts is greener, has a cost saving and may also be the most expedient - Covid and Brexit are having massive issues on automotive car parts and the raw materials used to make them - I’ve been waiting several weeks for a high level brake light on factory back order.
My brother has worked in an auto recycling workshop in California for years, where second hand parts that are removed, inspected, (potentially repaired if economically viable to do so), conditioned/certified and packaged. It is a very big business in the US for second hand parts for insurance and general repairs. His workshop is like an aircraft hangar - absolutely pristine with excellent engineering hygiene, not as most would imagine like a scrappy/breakers yard.