Chief Executive of Macau
Once M-99-99 had been reached in the 1980s, the system underwent another change to include a sequential serial letter after the 'M' prefix – the first registration issued in this format was MA-00-01. Registrations in the range MA-00-01 to MA-09-99 are reserved for government vehicles – e.g. MA-00-01 is allocated to the vehicle of the Chief Executive of Macau SAR.