Designating Parking and Private Outdoor Space

[Lee L.]

I have a multi-unit property under contract right now in the city of L.A., a city that has rent control. The property has ample parking spaces but the leases do not designate parking spaces for each of the units. Either before I take control of the property, or once I own the property, I'd like to designate parking spaces for each of the tenants, saying that each unit is entitled to only 2 spaces. 

How would I go about doing this? Do I take the issue up during contingency, or is creating these new rules a right I have as the owner, provided that I follow the lease? 

Another kind of related issue: one of the units has a fence that sort of separates itself from the rest of the property. Although I have no plans to take down the fence, I want this part of the property to be freely accessible by myself and the other tenants.  The lease does not say anything about the tenant having exclusive access to the area. 

How would I go about doing this?