This support letter is used to advocate for a bill or policy issue by a company with cleantech operations in a politician's district. When advocating for the extension of an expiring bill or a new statutory provision it is critical that the company establishes its presence in the district and that the policy change will help the company's growth or ability to do business. The letter provides a template for adding company specific facts, case examples and statistics, in the areas that are important to politicians when deciding whether to support a policy issue.