New requirements include language tests and further restrictions on welfare recipients. However, the residency period is reduced from 12 years to 10.
Those wishing to take out citizenship in Switzerland will face tougher requirements from January 2018.
The new federal law on nationality is among a number of legal revisions to come into effect with the new year.
In future only those immigrants who have a C residence permit will be eligible to apply.
From CIW NEWS Contributor
Switzerland (CH) is estimated to have a population of 8.4 million with a growth rate during 2010-2015 of 1.2% pa.
At the same rate of change, in five years' time its population will increase by 0.5 million.