A person may not willfully disobey any lawful order or direction of any police officer. This subsection may not be construed to authorize a police officer at a motor vehicle checkpoint, as defined in § 25–114 of this article, to target only motorcycles for inspection or evaluation, except as appropriate at a police checkpoint established as part of a police search or investigation. A police officer may summon witnesses to testify under oath on any charge brought under the Maryland Vehicle Law. A person may not willfully disobey a summons.