The board shall recommend to the Secretary 1 or more rates of assessment to be levied under subsection (a). If approved by the Secretary, the rates shall take effect. An order may provide that an assessment rate may not be increased unless approved by a referendum conducted pursuant to section 7417 of this title.
The rate for the charges shall be specified by the Secretary.
The board shall deposit in the account an amount equal to 10 percent of the assessments collected during the period referred to in paragraph (1).
The demand for a refund shall be made at such time and in such form as specified by the order.