(4) No license to operate an employment agency in this state shall be issued, transferred, renewed, or remain in effect, unless the person who has or is to have the general management of the office has qualified pursuant to this section. The director may, for good cause shown, waive the requirement imposed by this section for a period not to exceed one hundred and twenty days. Persons who have been previously licensed or who have operated to the satisfaction of the director for at least one year prior to September 21, 1977 as a general manager shall be entitled to operate for up to one year from such date before being required to qualify under this section. In order to qualify, such person shall, through testing procedures developed by the director, show that such person has a knowledge of this law, pertinent labor laws, and laws against discrimination in employment in this state and of the United States. Said examination shall be given at least once each quarter and a fee for such examination shall be established by the director. Nothing in this chapter shall be construed to preclude any one natural person from being designated as the person who is to have the general management of up to three offices operated by any one licensee. While employment directories may at the director's discretion be required to show that the person has a knowledge of this chapter, employment directories are exempt from testing on pertinent labor laws, and laws against discrimination in employment in this state and of the United States.