Congress moved the voting rights codes from 42 USC to 52 USC.
Voter Registration and Mail-in Ballots enacted under the Help America Vote Act of 2002 (Public Law 107-252) used to be
42 USC Sec 15483
https://www.govinfo.gov/content/pkg/PLAW-107publ252/pdf/PLAW-107publ252.pdf
Congress moved the referenced codes to 52 USC Chapter 205
https://uscode.house.gov/browse/prelim@title52/subtitle2/chapter205&edition=prelim
The requirements of HAVA 2002 are buried with different headings, requirements for voter registration and mail in ballots can be found
52 USC Sec 21083 Computerized statewide voter registration list requirements and requirements for voters who register by mail
https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title52-section21083&num=0&edition=prelim