Electronic Open Public Competition With The Award Criterion Of The Most Economical Proportional Bid Solely On The Basis Of A Price For The Entire Service Of The Exclusion Of "Lifeguard Coverage Of The Beaches Of The Municipality Of Piraeus", With Expenditure Budget 123,010.16 € Vat In Accordance With The Provisions Of Law 4412/2016. (Cpv: 75252000-7).