of the contributing agency. (ii) Any information not necessary to voter registration. (iii) Any voter information otherwise shielded from disclosure under State law or section 8(a) of the National Voter Registration Act of 1993 ( 52 U.S.C. 20507(a) ). (iv) Any portion of the individual’s social security number. (v) Any portion of the individual’s motor vehicle driver’s license number. (vi) The individual’s signature. (2) Voter record changes Each State shall maintain for at least 2 years and shall make available for public inspection and, where available, photocopying at a reasonable cost, all records of changes to voter records, including removals and updates. (3) Database management standards The Director of the National Institute of Standards and Technology shall, after providing the public with notice and the opportunity to comment— (A) establish standards governing the comparison of data for voter registration list maintenance purposes, identifying as part of such standards the specific data elements, the matching rules used, and how a State may use the data to determine and deem that an individual is ineligible under State law to vote in an election, or to deem a record to be a duplicate or outdated