1970—Pub. L. 91–452 struck out designation “(a)” preceding first sentence and struck out subsec. (b) which related to immunity from prosecution of any individual compelled to testify or produce evidence, documentary or otherwise, after claiming his privilege against self-incrimination.

Amendment by Pub. L. 91–452 effective on sixtieth day following Oct. 15, 1970, and not to affect any immunity to which any individual is entitled under this section by reason of any testimony given before sixtieth day following Oct. 15, 1970, see section 260 of Pub. L. 91–452, set out as an Effective Date; Savings Provision note under section 6001 of Title 18, Crimes and Criminal Procedure.