New parking on an existing campus

Our project is a new classroom building on an existing campus. The campus has a large existing parking lot which is adjacent to our project and which will serve the occupants of our building and other buildings on campus. It is not within our LEED project boundary. Our project will be adding 61 new parking spaces, which are within our LEED boundary. Our team plans to designate 4 preferred spaces for LEV/FEV parking as part of the additional parking that we are adding. We plan to ignore the existing parking lot. My question - are we meeting the intent since we are designating 5% of the new parking for LEV/FEV vehicles? Have others with a similar situation been asked to designate 5% of all potential parking for the project, or has the credit been satisfied with just designating 5% of the new parking? (Note, I have successfully done what we are proposing on other projects, but it was over 5 years ago.)