Condo in Greater Boston

[Leah M.]

Hi All, 

I recently moved to the Boston Area from NYC and would like to buy a condo unit as an investment here.  I wanted to get an idea about some basics. In NYC condos can basically always be rented out (as opposed to coops), but the condo board has to approve the tenant.  How do things work here? Are there building that don't allow owners to lease or have other restrictions? Can the rules be changed at the whim of the other owners? Does the condo board need to approve each tenant? Thanks!