(b) This section does not apply to a building or facility for which:

(1) the Department of the Environment determines that the use of coal products violates a provision of the Environment Article or a regulation that the Department adopts under that article; or

(2) the Department of General Services or another appropriate unit determines that the use of coal products would not be cost effective.

(c) The design of a heating system in a building or facility constructed after July 1, 1986 may not preclude the use of Maryland coal if:

(1) the State provides at least 50% of the money used for construction of the building or facility; and

(2) a determination is made that coal products will be used to fuel the heating system.