Parking for a residential facility

Dear All, I have a large mixed use project which includes residential areas. For residential areas, each flat will have a number of fixed parking spaces allocated to it. The location of the parking space is randomly selected by the Architects prior to finalizing the building. I was wondering what is the best option for this credit for the residential areas: 1) Discounted parking rates is not an option since each flat has a predefined number of parking spots which are the property of the flat occupier. 2) Providing preferred parking spaces is also not too feasible since it is unknown which flats will have low-emitting vehicles prior to building completion. I was thinking of this option: because the project is mixed use, and because this LEED credit's language doesn't go into details of mixed use project, I can calculate the total number of preferred parking spaces and allocate these for the other areas of the project (retail shops and offices) which have a paid parking. Do you think this is acceptable? I personally do not think the USGBC will ask for a breakdown of the preferred parking spaces between the residential and commercial parts. Thanks!