Ohio Gov. Mike DeWine, a Republican, signed a bill into law Monday scrapping required permits for carriers of concealed weapons, a move police unions said could put officers in peril and make the state "less safe."

Senate Bill 215, also known as "Constitutional Carry" by supporters, will make a concealed weapons permit optional for those 21 and older who are legally allowed to carry, while also eliminating the requirement that individuals "promptly" notify police officers they are carrying a concealed weapon.

The new law takes effect in about three months.

Opponents of the law have said it will make Ohio more dangerous.

They point to how the measure also discards the mandate requiring conceal carry permit holders to attend eight hours of training, which includes shooting practice.

"People get to carry a gun without any background check, without any training. It definitely makes Ohio less safe," said Michael Weinman, director of government affairs with the Fraternal Order of Police of Ohio.

 Editor Note:  The presence of guns at an event makes criminals far less likely to use deadly force, because they never know who and how many many be packing, and using a weapon against armed citizenry is likely to be fatal.