1958—Pub. L. 85–866 inserted “certified mail or” before “registered mail”.
Statutory Notes and Related Subsidiaries
Effective Date of 1958 Amendment
Amendment by Pub. L. 85–866 applicable only if mailing occurs after Sept. 2, 1958, see section 89(d) of Pub. L. 85–866, set out as a note under section 7502 of this title.