No later than July 1 of each even-numbered year, each agency, as defined in s. 16.75 (12)
(a) 1., shall submit a plan to the department, the joint committee on finance, and the standing committee of each house of the legislature having jurisdiction over energy, for reduction of the cost of energy used by the agency. The plan shall include all system and equipment upgrades or installations that are estimated to result in energy cost savings equal to the cost of the upgrade or installation over the anticipated life of the system or equipment. The plan shall also identify potential means of financing the upgrades and installations other than reliance on appropriations of general purpose revenues. The department of administration shall consider in its plan the means of financing allowed under s. 16.858.