What allows a company to begin using forms and rates as soon as they have been filed?

The correct answer is "File and Use States" because these states permit insurance companies to implement new forms and rates immediately after they have filed them with the relevant regulatory authority, without having to wait for explicit approval. This system encourages innovation and efficiency within the insurance market, as insurers can respond quickly to changes in the market or adjust their products based on demand.

In contrast, options like "Open Competition States" may allow for competitive practices but do not specifically address the immediate use of filed rates and forms. "Prior Approval States" require that the insurance company obtain approval from regulators before implementing any new rates or forms, which can slow down the process significantly. "Agent Deregulation States" focus on licensing and operational flexibility for agents rather than the filing and use of insurance forms and rates. Thus, the unique characteristic of File and Use States is that it streamlines the process for insurers, enabling them to bring new or adjusted products to market without delay once the necessary filings are completed.