(b) (1) “Agricultural building” means a structure that is used primarily to cultivate, manufacture, process, or produce agricultural crops, raw materials, products, or commodities.

(2) “Agricultural building” includes a greenhouse.

(c) “Building” has the meaning stated in the International Building Code.

(d) “Commercial building” means a building that is subject to the commercial provisions of the International Energy Conservation Code.

(e) (1) “Covered building” means a building that:

(i) 1. Is a commercial or multifamily residential building in the State; or

2. Is owned by the State; and

(ii) Has a gross floor area of 35,000 square feet or more, excluding the parking garage area.

(2) “Covered building” does not include:

(i) A building designated as a historic property under federal, State, or local law;

(ii) A public or nonpublic elementary or secondary school building;

(iii) A manufacturing building; or

(iv) An agricultural building.

(f) “Direct greenhouse gas emissions” means greenhouse gas emissions produced on-site by covered buildings.

(g) “District energy” means thermal energy generated at one or more central facilities that produce hot water, steam, or chilled water that then flows through a network of insulated underground pipes to provide hot water, space heating, air conditioning, or chilled water to nearby buildings.