Written permission shall be obtained from the commissioner at least thirty days in advance for any marine parade, regatta, race, tournament or exhibition to be held on state waters, as defined in section 15-127, or, by agreement between the United States Coast Guard and the commissioner, on federal waters, as defined in said section 15-127. The commissioner may grant season permits. Any person who obtains such permission shall be responsible for providing reasonable protection as prescribed by the commissioner and for taking reasonable precautions to safeguard persons and property. During any authorized event, the commissioner may require the person conducting it to conspicuously display one or more warning flags, warning buoys or warning signs as prescribed by the commissioner. When such warning devices are displayed, no watercraft not participating in the event shall cross the course or area of the event, except in an emergency. The warning devices shall be removed for reasonable periods of time during the event to allow nonparticipating watercraft to pass through the area. Any person who violates any provision of this section shall be subject to the penalty in subsection (b) of section 15-139.