Gov. Branstad has legalized the sale of bottle rockets, roman candles and most other consumer fireworks, sparking enthusiasm from vendors eager to expand into the state. Branstad signed a bill that allows sales between June 1 and July 8 as well as from Dec. 10 to Jan. 3. Under the law, cities and counties may forbid the use of fireworks, but they cannot prohibit their sale. However, local governments can control locations of firework sales. Firework sales in Iowa are expected to bring in about $1.5 million in sales tax revenue for the 2018 fiscal year.