• Requires voters to show "valid government-issued photographic identification" before receiving a ballot. The amendment does not specify which IDs qualify.

• Requires the state to provide photo ID "at no charge" to eligible voters. There may be costs to obtain underlying documents, however.

• Those voting in person without government ID "must be permitted to submit a provisional ballot," which will "only be counted if the voter certifies the provisional ballot in the manner prescribed by law." Supporters say this gives those without ID a second chance; opponents say it sets up a hard-to-administer system of two-step voting.

• All voters, "including those not voting in person, must be subject to substantially equivalent identity and eligibility verification" before voting. This would do away with Election Day vouching. Critics say it may also put up barriers to same-day registration and absentee voting.

• Amendment would be effective July 1, 2013, if it passes. The Legislature would have to fill in the blanks in the 2013 session, making the full impact hard to determine before then.