The Department of Public Health may, without examination, issue a license to any dental hygienist who has provided evidence of professional education not less than that required in this state and who is licensed in some other state or territory, if such other state or territory has requirements of admission determined by the department to be similar to or higher than the requirements of this state, upon certification from the board of examiners or like board of the state or territory in which such dental hygienist was a practitioner certifying to his competency and upon payment of a fee of one hundred fifty dollars to said department. No license shall be issued under this section to any applicant against whom professional disciplinary action is pending or who is the subject of an unresolved complaint.