OKLAHOMA CITY (AP) — The Oklahoma Supreme Court on Thursday overturned a $1.50 per-pack fee on cigarettes, ruling that lawmakers adopted the fee in violation of constitutional rules that dictate how and when revenue-raising measures can be approved.

The decision rejects the state's claim that the fee — which was expected to raise more than $250 million a year — was designed to protect the public by helping to reduce smoking rates and to compensate the state for the harm done by smoking. Tobacco manufacturers argued the bill's primary purpose was to raise revenue to operate state government.

Th...