Investment in Portorož Airport continued, and on 15 April 1991, the Casino Touristic Company Turistično podjetje p.o. Portorož adopt a memorandum of understanding and form a limited liability company: Aerodrom Portorož d.o.o. From 13 to 16 May 2004, aviation enthusiasts are welcomed at Portorož Airport, where the Aviatica general aviation air show takes place. Later that year, on 1 July 2004, Aerodrom Portorož d.o.o. signs an agreement with its new partners: The Municipality of Piran; Aerodrom Ljubljana, d.d.; Istrabenz, holdinška družba, d.d.; and Luka Koper, d.d. (Port of Koper). The recapitalisation plan is intended to facilitate further development of the airport in the near future.