Section 22-14-8-6 - Utility scale battery energy storage systems; compliance with NFPA 855(a) A utility scale battery energy storage system installation of which is subject to department approval under section 4(a)(1) of this chapter must comply with NFPA 855.(b) An installation added to an existing utility scale battery energy storage system in an expansion for which department approval is required under section 4(a)(2) of this chapter must comply with NFPA 855.Added by P.L. 217-2023,SEC. 1, eff. 7/1/2023.