On April 30, 2021. The Adriatic Aerospace Association Strategic Cooperation Agreement was signed with the Sisak Center for Space and Innovative Technology. The contract was signed by representatives of two organizations, in front of the Center, Acting director Stevče Arsoski, and in front of A3, president Slobodan Danko Bosanac.

The agreement was signed in order to achieve strategic and business cooperation in the field of space technology development in the Republic of Croatia. The agreement defines the rights and obligations of the two organizations in the implementation of the strategic project of the Center “Sisak-Moslavina County – the Seat of Space and Innovative Technology” and the business project of the Association “Perun I. – Launch of the first Croatian satellite”. Also, a contract was signed with a colleague and team member of Perun I, Jurica Kundrata on employment at the Center as an associate member.