Self employed occupation permit using rental income

Hi,

Your income must imperatively be generated by the business activity that you are undertaking when registered as a 'Self-Employed', that is MUR 600,000 (~USD 20,000) annually for the first two years and MUR 1,200,000 (~USD 40,000) as from the third year.
Other sources of income, local or foreign, do not count.

Your passive income on the other hand can be used as initial investment for the 'Self-Employed' permit or an 'Investor' permit.

The only scheme whereby you can use passive income freely for an OP is for the 'Retirement' Scheme.

Thanks winston that makes sense!
Here is my next question.
Lets say I do get the initial residence permit as a "retiree" using passive income from abroad and after 3 years qualify and get permanent residency (without the permission to work ), what is the route to citizenship, if any?
Im reading somewhere that 5 years of residency qualifies to apply for citizenship, but is that true for someone who is on a retirement visa too? Any input is appreciated. thanks!