Many public activities will be off limits to anyone without a so-called Covid Super Green Pass from Monday.
The pass shows proof of vaccination, or recovery from the virus within the last six months.
It will be needed to enter theatres, cinemas, music venues, sports events, restaurants and bars until mid-January.
The new measures strengthen the existing Covid green passes, which can be obtained following a negative test. The basic green passes will now be required to use public transport, as well as to access places of work.