Parking for CI 2009 project - LEED project boundary

If the Commercial Interior v2009 project has an existing parking that will serve its operations but no construction will be done, should it be included in the LEED project boundary? The CI project is 100% of the building area. Nothing will be done to the parking, besides installing preferred parking signs (so to pursue credit SS3.3 Alternative Transportation—Parking Availability). It seems to be optional if to include it or not, as "a) The facilities are not a part of the LEED project construction scope.". Also, if we exclude the parking from the boundary, can we still pursue SS3.3 Parking Availability? If we include it, is there any other credit requirement that we should be aware? I noticed exterior lighting pollution from parking (i.e. light traspass photometrics) is not included in the Commercial Interior rating. Please advise. Thanks!