employment of personnel employed under the contract;  the negotiated tender procedure originating from the Qualification System to award Emergency Services, and scheduled and ancillary maintenance work on gas in the area managed by AcegasApsAmga, for the 2018 - 2019 period, with the right to renew, at the same contractual conditions year by year at the sole discretion of the client for a further three annual periods, for a total of Euro 6 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 openended 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.