Requiring tenants to include base building toilet fixtures in their calculations will ultimately discourage some tenants from pursuing LEED. We have recently renewed our lease and intend to pursue LEED Gold for our new space build-out. Unfortunately, we have no control over the base building plumbing fixtures. Since we are committed to a "green" design, we will still pursue whatever points we can, even if we are unable to obtain LEED certification because we can't meet this pre-req.
Less committed tenants may decide that a green design is not worth the effort if they have no chance to obtain certification. What a shame.