In section 122A—
"child" means a person under 18;
"harm" from the defendant means physical or psychological harm caused by the defendant doing an act of a sexual nature;
"the public" means the public in the United Kingdom;
"vulnerable adult" means a person aged 18 or over whose ability to protect himself or herself from physical or psychological harm is significantly impaired through physical or mental disability or illness, through old age or otherwise.
Where the defendant is a child, a reference in that section to a magistrates' court is to be taken as referring to a youth court (subject to any rules of court made under section 122K(1)).
In that section "relevant police area" means—
where the applicant is a chief officer of police, the officer's police area;
where the applicant is the applicant of the National Crime Agency , the chief constable of the British Transport Police Force or the chief constable for the Ministry of Defence Police—
the police area where the person in question resides, or
a police area which the Director General believes the person is in or is intending to come to.