Under what conditions may a contract acceptor subcontract activities to third parties?

The contract acceptor may not outsource any of the work given to him/her by the contract giver to a third party without the written permission of the contract giver. (EU GMP Guide, Chapter 7.11)

[GMP Compliance Adviser, Chapter 1.L]

You can find out more about this topic:

The GMP Compliance Adviser is the world's largest knowledge portal for quality management in the pharma business!