Open Procedure With Community Relevance For The Awarding Of The Three-Year Cleaning Service Of The Locations Of The Petruzzelli And Theatri Di Bari Opera-Symphonic Foundation In Accordance With Art. 71 Of The Legislative Decree. 36/2023 And In Compliance With The Minimum Environmental Criteria Referred To In The Decree Of The Ministry Of The Environment And Protection Of The Territory And The Sea N. 51 Of 29 January 2021