What are the visa & residency requirements in Iowa?

"To obtain a visa for Iowa, one must first determine the type of visa that best fits their particular situation and its requirements. Then, one must gather all necessary documents, such as a valid passport and proof of financial support, resulting in the completion of the application. Once the application is submitted, the visa may take anywhere from several weeks to months to process. Residents of Iowa must first apply for a valid driver's license or state identification card, which is used as a proof of residency. Next, one must file an application with the Iowa Department of Transportation and demonstrate proof of address such as a rental agreement or utility bill. Additional paperwork required may include household tax and employment records, as well as information about the applicant's sources of income. Then, a cost must be paid for the processing fee for the application. Once it is filed, the applicant may receive a response from the state within 3-4 weeks," said another expat in Iowa.