The Department may adopt rules and regulations to effectuate the following purposes: To restrict catching and possessing any blue crab; The methods by which crabs are taken; To close or open any specified area to catch crabs; To prohibit or restrict devices used to catch crabs; To establish seasons to catch crabs; To establish that the workday for tidal fish licensees who catch crabs using trotline gear may begin earlier than 1 hour before sunrise; and To establish minimum size limits for hard, soft, and peeler crabs. However, this section does not permit the Department to change existing license fees for catching, picking, canning, packing, or shipping cooked hard or soft crabs or crab meat; or for selling, or shipping live hard or soft crabs by barrel or crate. The Department may set license fees on types of gear or equipment if not otherwise set by law. The Department may not adopt regulations to: Restrict a tidal fish licensee who catches crabs using trotline gear to a workday of less than 8 hours per day, excluding time spent setting or taking up gear; or Establish time restrictions on a tidal fish licensee using trotline gear for setting and taking up gear. Except as provided in subsection (c) of this section, if the Department authorizes the workday to begin earlier than 1 hour before sunrise, then: The Department may not adopt regulations to restrict a tidal fish licensee who catches crabs using trotline gear to a workday of less than 11 hours per day, including time spent setting or taking up gear; and Trotline gear may not be set earlier than the catch time established by the Department. The Department shall adopt regulations that authorize a tidal fish licensee who is authorized to catch crabs using all legal gear to work 1 additional early hour on Labor Day, Memorial Day, July 4, and the day before each of these holidays in a license year. The Department’s regulations may not become effective under this section until the Department first holds public hearings. The Department shall advertise the time, place, and purpose of the hearings in one newspaper of general daily circulation in the State, and at least in one newspaper circulated in the affected region of each county whose waters may be directly affected by the proposed regulations at least once per week for 2 successive weeks in advance of the hearings.