1960—
Pub. L. 86–507 inserted “or by certified mail” after “registered mail”, and “or receipt for certified mail” after “registry receipt.”
“United States Postal Service” substituted in text for “Post Office Department” pursuant to
Pub. L. 91–375, §§ 4(a),
6
(o), Aug. 12, 1970,
84 Stat. 773, 783, which are set out as notes preceding section
101 of Title
39, Postal Service, and under section
201 of Title
39, respectively, which abolished Post Office Department, transferred its functions to United States Postal Service, and provided that references in other laws to Post Office Department shall be considered a reference to United States Postal Service.