https://www.epo.org/en/service-support/faq/law-practice/unitary-patent/requesting-unitary-patent/what-procedure-obtaining

What is the procedure for obtaining unitary effect?

The procedure   for obtaining unitary effect is  described in detail in section 2 of the Unitary Patent Guidelines. The graphic below outlines the procedural steps taken by the proprietor and the EPO during the registration process.