https://www.epo.org/en/node/what

What is the legislation governing the EPO’s procurement procedure?

As an intergovernmental and self-financing organisation, the European Patent Organisation is not governed by national or EU legislation on public procurement. It has its own procurement rules which are laid down in its Financial Regulations and implementing provisions.

These rules provide that goods, works and services are acquired by competition whenever possible, and that awards are made either on a discretionary basis, taking account of a variety of factors, or on the basis of price alone.