(1) Except as provided in sub. (3), in supervising and authorizing the implementation of the state building program under the appropriation authority of s. 20.867, the building commission:
(a) Shall authorize the design and construction of any building, structure or facility costing in excess of $1,000,000 regardless of funding source, only if that project is enumerated in the authorized state building program. Beginning in fiscal year 2023-24, this amount is $2,000,000.
(b) Shall authorize the acquisition of land, or the repair, remodeling or improvement to any existing building, structure or facility costing in excess of $1,000,000, regardless of funding source, only if that project is enumerated in the authorized state building program. Beginning in fiscal year 2023-24, this amount is $2,000,000. This paragraph does not apply to the acquisition of land by the building commission in the city of Madison within a block number specified in s. 13.48 (18). This paragraph does not apply to projects authorized under s. 16.858.