Me. Rev. Stat. tit. 5, § 1766-A

No later than January 1, 2010, all electricity consumed in state-owned buildings must be supplied by renewable resources. For purposes of this section, "renewable resource" has the same meaning as in Title 35‑A, section 3210, subsection 2, paragraph C. In purchasing electricity for state-owned buildings, the State may give preference to electricity generated by community-based renewable energy projects, as defined in Title 35‑A, section 3602, subsection 1 and electricity generated by combined heat and power projects, as defined in Title 35‑A, section 3622, subsection 1.