Vehicle registration plates of Hong Kong

In Hong Kong, vehicle registration marks are managed by the Transport Department. The physical number plates are not provided by the government, but are made by garages to the order of the car owner.
Overview.
Each vehicle must display two number plates, one at the front and one at the rear of the vehicle. The front plate has black characters on a white background, and the rear plate has black characters on a yellow background. The height of the letters and numerals are not less than 8 cm (3.1 in) and not more than 11 cm (4.3 in). The plates should comply with British Standard B.S. 145a and have permanently marked on the plate the specification number "B.S. AU 145a".
Numbering system.
Vehicles of the Chief Executive do not have registration plates. Instead, they have the Emblem of Hong Kong in front and at the rear. During British administration, the vehicle of the Governor bore the St Edward's Crown emblem.
Usual numbers.
Most car numbers consist of a two-letter prefix followed by a number between 1 and 9999 without leading zeroes. Some car numbers do not have a letter prefix. The letters "I", "O" and "Q" are not used to avoid ambiguity.
The very first numbers allocated (1–9999) have no prefixes. "HK" and "XX" were the first two prefixes allocated, then went from "AA", "AB", "AC", all the way to "AZ", then "BB", "BC", "BD", all the way to "BZ" and then "CA", "CB", "CC", and so on. However AM was reserved for Government vehicles. There was no "BA" prefix allocated at the time because the government thought that it would get mixed up with "AB". "BF" was also skipped; however, authorities changed their minds to allocate the "CA" prefix after "BZ", and in 2003, "BA" and "BF" prefixes were available for auction.
The prefixes "FU", "FV" and "ZM" were also issued out of turn. "FU" and "FV" are typically issued to vehicles with primary registration abroad (Primarily in Mainland China), and "ZM" in Macau, and are used as their "cross-border" plates while in Hong Kong. Some "DW" and "EW" registration marks are also used for this purpose.
Shortly prior to the handover of Hong Kong on 1 July 1997, the Advanced Detachment of the People's Liberation Army entered Hong Kong. The vehicles of the Advanced Detachment were assigned a series of "AD" registrations for their Hong Kong registrations. These vehicles also displayed their Mainland Chinese registrations whilst in Hong Kong.
Some prefixes are reserved and have special meanings.
As of May 2021, the current allocated prefix is "XH".
After the exhaustion of two-digit prefixes "ZZ", a new scheme will be required but it has not yet been announced.
Motorcycles.
Formerly, motorcycles used a different set of registration marks. Like the marks for cars, the very first numbers had no prefixes. Later, marks with a single-letter prefix were issued. For example, "B 281", "C 367".
The separate issuance system of registration marks for motorcycles has been discontinued and merged with the main system. Some registered motorcycles still bear the early marks. Hence, a unique registration mark without letter prefix could be found on two different types of vehicles.
Unusual numbers.
Letters-only.
These are specific car "numbers" with no numbers, simply letters only
Special registration marks.
A car number is a special registration mark if
Although unlisted above, some traditional lucky numbers may be reserved, especially numbers that contain 3 or 8, which are pronounced in Cantonese similarly to words that mean "long life" and "prosperity" respectively. For example, 168 is always a reserved number since its pronunciation in Cantonese means "Rich all-time".
Lucky numbers are allocated only after sale by public auction which takes place from time to time. The proceeds of the auction goes to the Government Lotteries Fund to be used for charitable purposes.
Auction of numbers.
From 1973, the Transport Department of the Hong Kong government conducts auctions to sell numbers. Currently, auctions are usually on Saturdays and sometimes on Sundays, and there are about two auctions per month. Numbers sold must be assigned to a car registered in the name of the buyer of the number within 12 months from the date of auction. The car can be an existing car of the buyer, or a car purchased from someone else after the auction, or a brand new car to be purchased after the auction. The Transport Department can advise whether a number has been allocated.
Auction of special registration marks.
A special registration mark obtained in an auction is not transferable, that is to say, the number can be used only on vehicles registered under the name of the buyer. Transferring a special registration mark from one vehicle to another is permitted provided that they are both owned by the same person. Sale or transfer of vehicles bearing a special registration mark to someone else would lose that special registration mark. If the buyer is assigned the special registration mark to a vehicle, and later dies, the special registration mark cannot be transferred together with the vehicle to his heirs. Therefore, it is very important to consider in whose name one should buy a special registration mark in an auction. The use of a limited liability company as the buyer gets around the non-transferable restriction because of its perpetual succession and the ability to transfer the company shares.
Reserving numbers for auction.
Except with "AM", "LC" or "ZG" prefixes, any unallocated usual numbers may be reserved for auction, provided it has an earlier prefix in the sequence, or the current prefix, or the next immediate prefix. For example, if the current prefix is "LX", then a number with a prefix "AA", "AB", ..."AZ", "BA", ... "LX", or "LY" may be reserved for auction. Numbers having no prefix or a "XX" prefix may also be reserved for auction. It is doubtful whether numbers with the "ZG" prefix may be reserved for auction after the prefix runs to "ZF".
To reserve a non-special registration mark for auction, one needs to pay a deposit of HK$1000. The minimum price for the number is also HK$1000. If the number is successfully bid for by a person other than the person who reserved the number, their deposit is refunded. If no one else bids at the auction, the number is sold to the person who reserved the number, for HK$1000. If it is a special registration mark, there is no deposit to pay, and the minimum price will be set by the Transport Department but will be higher than HK$1000.
Personalised Vehicle Registration Marks Scheme.
Th Personalised Vehicle Registration Marks Scheme was adopted since 2006 to allow creation of numbers with up to 8 characters (including letters and/or numbers). The letters "I", "O" and "Q" are banned from use in the new scheme, with the former two letters officially recognised as numbers "1" and "0" respectively. Since "I" and "O" look identical to "1" and "0" under the standard font type used on Hong Kong plates, phrases like "SIU SIU" and "I LOVE U" can be printed on the plates, although they are officially recognised as "S1U S1U" and "1 L0VE U", respectively.
The numbers under this scheme are auctioned for a minimum of HK$5000. Although drivers are usually granted their choice of plate, obtaining a unique or easily recognised plate can be very competitive. For example, the registration "I LOVE U" was sold at a charity auction for HK$1.4 million. The first PVRMS auction was held on 16 September 2006.
Owners of number 1 to 10.
The plate "1" is reserved for the Commissioner of Police, while plate numbers '2' to '10' have all been sold at auction. Some of the owners are Hong Kong celebrities. The current owners of number plates 1 to 10 are:
Diplomatic vehicles in Hong Kong.
Unlike some other countries (where diplomatic cars have special registration numbers), cars operated by foreign consulates, consular staff, and various international organisations have been given "CC" (consular corps) badges, with red writing on a white background. These are oval in shape, and are much smaller than the registration plate, but are affixed to the front and back of the vehicle.