A fee, as determined by the board, must be paid to the board for original licensure. A fee may also be established for the licensure examination. A license is valid for two years and must be renewed biennially, with the renewal fee being determined by the board. The board may also establish a fee for a duplicate license. Any applicant for renewal of a license that has expired must be required to pay a late fee determined by the board. The board may also establish a fee for continuing education sponsors. The fees established under this section must be adequate to establish and maintain the operation of the board. Payment of a late fee is not a defense to a charge of practicing without a license.