Any person who has served in the armed forces of the United States and who was a holder in good standing of a registration or a license as provided in this chapter at the date of his entry into the armed forces may, upon his separation from active duty in said armed forces or within one year thereafter, make application to the Department of Public Health for the reinstatement of the registration or license which he held at the time of his entry into the service as aforesaid. Said department shall issue such registration or license to such an applicant without examination, if it approves of his professional qualifications.