Notwithstanding § 5920 of this title or any other section, the application by any person seeking employment in the Department shall be rejected if it indicates, on its face, that the applicant does not meet the minimum qualifications for the position sought. Applications shall also be rejected if the applicant has made false statements or misrepresentations on the application; is habituated to the intemperate use of alcoholic beverages or the use of harmful drugs which makes the applicant unable to perform duties required by the position; has a record of court convictions or infamous or other conduct which renders the applicant unsuitable for employment; or has been separated from any branch of the armed forces under conditions other than honorable.