The government has made high-security registration plates (HSRP) mandatory for new vehicles but a large number of cars and two-wheelers bought in the past few months still use traditional number plates.
A senior transport department official said more than 70,000 high-security plates made in the past five months were still lying in the godowns of the manufacturer.
The police have now decided launch a crackdown on new vehicles without high-security plates.
"We will launch a drive on Monday and prosecute new cars found plying without high-security plates for more than seven days and slap a fine of R 2000 on owners for violation of rules. Their vehicles may also be seized," said Satyendra Garg, joint commissioner of police (traffic).
Officials said transport department officials and the traffic police had a detailed discussion on the issue last Tuesday.
The plate manufacturer said they were doing their best to make people get the new plates installed.
"We have started sending text messages to vehicle owners and making phone calls, requesting them to get the high-security plates fixed. We are working with the Delhi government to find ways to make people aware that these plates are mandatory and for safety of their own vehicles," said UR Kapoor, director-operations, Rosemerta Technologies.
The officials said owners already pay for the new plates at the time of purchase and just have to take their new vehicles to the zonal transport office to get them installed. But many owners find the process of going to the transport office cumbersome.
Car registration plates cost R214 per set; those for two-wheelers cost just R 69. The new plates have security features such as a chromium-based hologram and non-removable-non-reusable snap lock to guard the vehicle against thefts.
Acting on the Supreme Court's orders, the transport department made it mandatory from May 1 for all new vehicles -- two-wheelers, cars, buses and other commercial vehicles -- to have high security registration plates. The transport department has given the contract to manufacture and install new registration plates to a private company called Rosemerta Technologies.
"The transport office issues a slip to the vehicle owner which he has to produce at the counter of the company. The owner is given a date when he can get the plate installed. While vehicle owners deposit the slip at the company's counter, most of them never go back to get the plates installed," the official said.
More than 1,300 new vehicles are sold in Delhi every day. The company has opened its counters at 13 zonal transport officers where the plates are issued.