OKLAHOMA CITY – Nearly three dozen states have failed to meet conditions of a 2006 federal law that requires them to join a nationwide program to track sex offenders, including five states that have completely given up on the effort because of persistent doubts about how it works and how much it costs.

The states, including some of the nation’s largest, stand to lose millions of dollars in government grants for law enforcement, but some have concluded that honoring the law would be far more expensive than simply living without the money.

“The requirements would have been a huge expense,” said Doris Smith, who oversees grant programs at the Arkansas Department of Finance and Administration. Lawmakers weren’t willing to spend that much, even though the state will lose $226,000.