(a) The commission may not lease space to a private tenant for use as private office space unless the private office space is related and incidental to another commercial, cultural, educational, recreational, or child care activity of the tenant in the building.
(b) Except as provided by this subchapter and Chapter 663, the commission shall determine the amount of space in a building to be allocated to private tenants and the types of activities in which the tenants may engage according to the market for certain activities among employees and visitors in the building and in the vicinity of the building.

(c) Except as provided by § 2165.215, the amount of space allocated to private tenants may not exceed 15 percent of the total space in the building. Space leased to provide child care services for state employees does not count toward the 15 percent maximum.
(d) If the commission allocates space in a building to a private tenant, it shall encourage the tenant to lease space with street frontage or space in another area of heavy pedestrian activity.