In these Regulations—
“ the 1988 Act ” means the Road Traffic Act 1988;
“ chief officer ” means—
in relation to a police force maintained under section 2 of the Police Act 1996 , the chief constable;
in relation to Police Scotland, the chief constable;
in relation to the metropolitan police force, the Commissioner of Police of the Metropolis;
in relation to the City of London police force, the Commissioner of Police for the City of London;
in relation to the British Transport Police Force, Ministry of Defence Police and Civil Nuclear Constabulary, the chief constable, and
in relation to the National Crime Agency, the Director General.