In the City of Virginia Beach, except for blinds and floating blind sites which that may be erected by the department, no new blinds in the public waters shall be erected and no licenses shall be issued for the erection of new shore or stationary water blinds upon the shores or in the public waters, nor may floating or mat blinds anchor within 500 yards of the shores of lands or blinds owned or controlled by the department, except that floating blinds may be stationed at sites designated by the department. Blinds and floating blind sites erected by the department shall not be licensed, but there shall be a metal plate affixed to such blinds for identification purposes.