A new Zealand pizza chain aims to become the world's first company to offer a commercial drone delivery service, a milestone in the quest to save time and money with an airborne supply chain dispensing with people. Some of the world's biggest companies, including Amazon and Google, plan to do deliveries by drone. Aviation authorities in the US, Britain, Australia and New Zealand have been relaxing rules to allow air deliveries.Last month, US convenience store chain 7-Eleven conducted the first single commercial drone delivery as part of a trial.Domino's Pizza Enterprises conducted a demonstration pizza delivery by drone in the New Zealand city of Auckland this week. Afterwards, it said it aimed to be the first company to launch a regular drone service late this year."We've always said that it doesn't make sense to have a two-ton machine delivering a 2kg order," said Domino's CEO Don Meij.With clear skies and a small population of 4.4million, New Zealand last year became one of the first countries to clear commercial drone deliveries."Our enabling laws and regulation means that we have the ideal environment," New Zealand Transport Minister Simon Bridges said after the Domino's test flight.But Philip Solaris, director of drone company X-craft Enterprises, said that while New Zealand had accommodating regulations on drones, Domino's would be held back by a rule requiring drones to be kept in sight at all times."I can't truly see how commercially viable that idea is because you would have to literally have somebody walking along to keep it in the line of sight, watching it at all times," Solaris said.Domino's service would still need to overcome "random hazards [such as] power lines, moving vehicles, children in the back yard playing", he said.The Domino's and 7-Eleven deliveries both used drones provided by US-based Australian drone company Flirtey.Domino's said it was also looking at opportunities for drone delivery trials in Australia, Belgium, France, the Netherlands, Japan and Germany.In Australia, drone deliveries will be legal next month, provided the drones stay at least 30m from houses.In the US, drones will be allowed to make deliveries from tomorrow, but not across state lines or over people.- Reuters..