ISO 3166-2:MU is an ISO standard which defines geocodes: it is the subset of ISO 3166-2 which applies to Mauritius.
Each two-part code consists of the ISO 3166-1 code for Mauritius (MU) and a 2-character-alphabetic sub-code, hyphenated together.
MU-AG
MU-BL
MU-BR
MU-CC
MU-CU
MU-FL
MU-GP
MU-MO
MU-PA
MU-PL
MU-PU
MU-PW
MU-QB
MU-RO
MU-RR
MU-SA
MU-VP