For the purposes of deciding the fee for a site inspection—

• “super site” is a site at which 250 or more relevant persons are employed;

• “major site” is a site at which 60 or more, but fewer than 250, relevant persons are employed;

• “standard site” is a site at which 10 or more, but fewer than 60 relevant persons are employed;

• “minor site” is a site at which fewer than 10 relevant persons are employed;

• “relevant person” means a person employed on the premises and systems inspected.