During September of 2003, the Greek state called upon an additional urban transportation extension, which was assigned to OASTH, without the use of buses owned by KTEL THESSALONIKIS S.A. Thus, since September 2003, an additional number of 15 Prefecture municipalities (Langada, Koufalion, Basilikon, etc.) are being served by OASTH. In exchang, 26 OASTH equities/stocks were given to “KTEL THESSALONIKIS S.A.” and a staff of approximately 200, was transferred from KTEL to OASTH. KTEL withdrew all of its remaining, “post-expansion” buses and now serves 9 municipalities of the Thessaloniki Prefecture: 1. Agios Georgios, 2. Apollonia, 3. Arethousa, 4. Vertikou, 5. Egnatia, 6. Kallindoion, 7. Maditou, 8. Rentina and 9. Sohou) and naturally the Thessaloniki-Athens & Piraeus line.
KTEL are supervised by the Minister of Transport and the Regional Governor of each location office and managed by an elected administrative board as a public limited company (anonymous company S.A.). Despite operating as private companies not subsidized directly by the state (compared to other public passenger transport), KTEL are non-profit-making entities of state supervision. KTEL rates are set by the state, insuring transportation as a public service of high importance.