The department of transportation, in making any examination or investigation provided for, has the power to issue subpoenas for the attendance of witnesses by such rules as it may prescribe.Acts 1897, ch. 10, § 10; Shan., § 3059a29; Code 1932, § 5405; T.C.A. (orig. ed.), § 65-314; Acts 1995, ch. 305, § 10.
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