Open Electronic Procedure Aimed At The Sample Of The School Refection Service With A Prevalent Biological Diet And With Reduced Environmental Impact (Ministerial Decree 10.03.2020 D.2.01.2021- Ministerial Decree 03/08/2023) For School Years 2025/2026, 2026/2027 And 2027/2028 Renewable Of Further N. 3 (Three) Years (Three) Years (Three) Years