Kimberly - you should check out the PE Guide to Energy Star: http://www.energystar.gov/ia/business/evaluate_performance/pm_pe_guide.pdf
It details what can and cannot be excluded. Generally, teams have the option of either including or excluding exterior parking and the energy consumption associated with it, as long as it's submetered. However, if you don't report the energy, you need to make sure that you also excluding the parking area or you would end up with an artificially low score.