The chairman signed a law May 8 requiring sex offenders, living on the reservation, to register with the tribal police department. The law, signed by Chairman Edward D. Manuel, requires those with prior sexual offense convictions to notify police of even temporary addresses. The tribal police department will notify neighbors when sex offenders move in. Police Chief Larry Seligman said police statistics show the number of sex offenses on the reservation are on the rise. The new law should raise community awareness and protect residents from sexual predators, he said.