The executive director will furnish, without charge, forms and instructions for preparing an application. The use of such forms is not mandatory, but the information required by such forms must be provided in any event. Supplements may be attached if there is not sufficient space on the printed form. If supplements are used, the data and information entered thereon shall be separated into paragraphs numbered to correspond with those on the printed form. A supplement explaining the project and planned operation may be attached to an application.