On arrival you should be given a visa for two or three months-provided you have all the relevant details-return ticket, letter from sponsor here or confirmation of a hotel booking etc..Before the visa expires you may extend it by applying in person complete with relevant documentation to the Passport and Immigration Dept Sterling House Port Louis. The Government website has details
http://www.gov.mu/portal/site/passportS ... 9a68521ca/When extending you must also provide a passport sized photograph in addition to the documentation listed on the website