def clearPortOwnership(self, portList):
        """
            Description
                Clear port ownership on the portList

            Parameters
                portList: <list>: A list of ports in a list: [[chassisIp, cardId, portId]]
        """
        response = self.ixnObj.get(self.ixnObj.sessionUrl+'/availableHardware/chassis')
        for eachChassis in response.json():
            chassisIp = eachChassis['ip']
            chassisHref = eachChassis['links'][0]['href']

            for userPort in portList:
                userChassisIp = userPort[0]
                if userChassisIp != chassisIp:
                    continue
                userCardId = userPort[1]
                userPortId = userPort[2]
                url = self.ixnObj.httpHeader+chassisHref+'/card/'+str(userCardId)+'/port/'+str(userPortId)+'/operations/clearownership'
                data = {'arg1': [chassisHref+'/card/'+str(userCardId)+'/port/'+str(userPortId)]}
                self.ixnObj.post(url, data=data)