No person shall be excused from testifying or from producing any books, accounts, maps, papers or documents in any action or proceeding, based upon or growing out of any alleged violation of any of the provisions of this act, on the ground or for the reason that the testimony or evidence, documentary or oral, required from him, may tend to incriminate him or subject him to penalty or forfeiture; but no person having so testified shall be prosecuted or subject to any penalty, punishment or forfeiture on account of any transaction matter or thing concerning which he may have testified or produced any documentary evidence, providing that no person so testifying shall be exempted from prosecution or punishment for perjury committed in so testifying.