INDIANAPOLIS (AP) — Daily fantasy sports companies would be regulated by the Indiana Gaming Commission under a bill endorsed by state lawmakers.

The Indiana Senate voted 34-10 to give final approval to the proposal Friday, sending it to Gov. Mike Pence for consideration.

The bill requires players be at least 18 years old, prohibits contests based on college or high school sports, and sets an initial licensing fee of $50,000 for companies, along with an annual $5,000 fee.

Supporters say the bill is necessary to ensure fair contests for the estimated 1 million Indiana residents who play the online fantasy sports games for cash prizes. Opponents argue that the games amount to gambling on sporting events and shouldn’t be legalized.

About 20 states are considering bills to regulate the industry.