Eastern Iowans hoping to celebrate the Fourth of July with their own pyrotechnics first should make sure they may legally do so.While the Iowa Legislature last year legalized the sale of fireworks across the state, local governments have the authority to regulate their use within their respective boundaries.Several communities have passed local rules limiting or outright banning the use of fireworks, creating a patchwork of regulations across Linn and Johnson counties.“I think the biggest problem for us is trying to figure out exactly what the specific law is for each community that we serve.