The director of labor and training shall allow or deny applications for master or contractors’ or journeyperson’s license upon the recommendation of the division as soon after the examination as practicable. Each applicant who has successfully passed the examination and has had his or her application allowed shall be issued a certificate of license in the category tested for as a pipefitter or refrigeration/air conditioning or fire protection sprinkler contractor/sprinkler fitter master or journeyperson or sheet metal contractor or journeyperson sheet metal worker by the division on payment of the proper fee.