A final batch of 70 cameras arrived only yesterday morning, meaning a big push by installers to fit them before the exemption was due to run out.
General manager Barry White said last night that his entire 900-strong fleet was now compliant with the new security legislation.
He said North Shore Taxis, a Co-op subsidiary, was the last part of the operation to be fitted out and the injunction was granted on the ground that most of its cars were needed to carry special needs children to school.
Mr Doesburg said the only other companies still with exemptions were based in Whangarei, Queenstown and Invercargill, where the removal of their cars from the roads would have caused undue inconvenience to the public.
Robert Gregory, owner of A1 Cabs in Whangarei, said his company had run into supply problems which had left it with enough cameras but no panic alarms to go with them.
He was hoping to obtain the necessary alarms for his 26-vehicle fleet before his latest time extension runs out on Sunday night.
A number of cabs run by Mt Roskill-based Cheap Cabs were understood to be queued up at an auto-electrical firm yesterday, as installers worked flat out on a three-hour fitting job.
Its management was unavailable for comment.
Alert Taxis director Robert van Heiningen said his group's 400 cars were fully compliant by August 1, when the legislative requirement for cameras took effect, and there was no excuse for vehicles not to be compliant by now.
He said the cameras were designed to protect drivers and were "not just some frivolous idea".
Cameras range in cost from about $700 to $1100, after reductions in price from early quotes of more than $1500, and will ultimately result in slightly higher fares.
Mr Doesburg said the cameras were to protect the public as well as taxi drivers.
Any driver who accepts a fare without having a camera in a cab risks being fined $400, and taxi companies face paying $2000.