For the purposes of rule 51 words, behaviour or material are racist if they demonstrate, or are motivated (wholly or partly) by, hostility to members of a racial group (whether identifiable or not) based on their membership (or presumed membership) of a racial group, and “membership”, “presumed”, “racial group” and “racially aggravated”, shall have the meanings assigned to them by section 28 of the Crime and Disorder Act 1998.