The Secretary may subpoena, administer an oath to, and examine under oath any person if the Secretary considers it necessary for the effective administration of the Secretary’s duties. A person who fails to appear before the Secretary or refuses to testify when subpoenaed under this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $500. A person who makes a false statement under oath before the Secretary is guilty of perjury and on conviction is subject to the penalty provided under § 9–101 of the Criminal Law Article.