Percentage ownership needed to manage property in Illinois?

[John Baughman]

Maybe its been asked, but I cannot find it anywhere. 

In Illinois, one needs a license to manage real estate for others.  But owners can manage their own properties.

Does anyone know what percentage of a property a person would need to own in order to manage it without being a real estate agent?  I.E. If I own 10% of an apartment complex would it be legal for me to manage the asset without a license?