On the last possible day to do it, Gov. Jay Nixon today signed Missouri legislation that will allow the use of hemp oil for children with rare forms of epilepsy.

The CBD oil, which is low in the THC compound that gives users a "high," is becoming a preferred alternative for many parents when several other approved treatments aren't effective in reducing their children's seizures.

Though hemp oil has not completed many clinical trials yet, parents nationwide claim the treatment has reduced the occurrence of episodes in their children from hundreds of times a week down to a few times a week.

The legislation went to Nixon's desk in May, and he had until today to sign it or veto it. If he did nothing, it would still go into law.