For multi-tenant buildings, up to 10% of the floor area may be exempted from almost any credit if the area is not under management control. If you do not control the cleaning in more than 10% of your building, you will have to work closely with your tenants in order to achieve the credit. For the green cleaning prerequisite policy, on the other hand, the scope of that document can be limited to the areas directly controlled by building management. This applies to the prerequisite policy only, and not to this credit.