intentionally obstruct any person acting in the execution of these Regulations;

without reasonable cause, fail to give to any person acting in the execution of these Regulations any assistance or information which that person may reasonably require for the purposes of his functions under these Regulations;

furnish to any person acting in the execution of these Regulations any information which they know to be false or misleading; or

deface, obliterate or remove any mark made by an inspector under these Regulations.