When the authority is conferred or the obligation is imposed upon the public utilities commission to ascertain the value of any public utility or railroad, such valuation shall be made in accordance with sections 4901.01 to 4901.14, 4901.17 to 4901.24, 4903.10, 4903.12 to 4903.19, and 4909.04 to 4909.15 of the Revised Code.
R.C. § 4909.09