 the negotiated tender procedure originating from the Qualification System to award day and night, working day and holiday emergency support services, and extraordinary works and maintenance of networks, connections and accessories of water and sewerage services in the area managed by AcegasApsAmga, for the year by year, for a further three annual periods, for a total of Euro 24 million, which referenced the requirement for the successful bidder to apply the Italian collective labour agreement for the construction industry and make an job offer that is consistent with professional requirements and duration of the contract with personnel that is employed under open-ended contracts and employed directly and mainly in the activities covered by the contract in force at the outgoing operator in the 90 day period prior to the beginning of the new management period.