The Commission shall keep itself informed of all new construction, extensions, and additions to the property of all public utilities, and shall prescribe the necessary forms, regulations, and instructions to the officers and employees of all public utilities for the keeping of construction accounts, which shall clearly distinguish all operating expenses and new construction.
D.C. Code § 34-1116
Commission's authority to order improvements and repairs, see § 34-808. Public Service Commission, creation, powers and duties, see § 34-802. .