From the same paper on EURATOM:

The existence of safeguards supervision by the European Commission was an important element in the EURATOM cooperation agreements with third States. Especially in the early days of the Treaty it paved the way for the facilities in the EURATOM Member States to receive nuclear materials and equipment. EURATOM’s first nuclear cooperation agreement was concluded with the USA and entered into force in 1958. It was followed by nuclear cooperation agreements with a number of other countries. Many of these cooperation agreements include reporting requirements on the use of the supplied nuclear materials or equipment, and are going beyond the scope of IAEA safeguards.