The term 'sexual activity' in s 63B(3)(a) of the Criminal Law Consolidation Act 1935 (SA) includes verbal communications capable of being sexually stimulating, not only physical activities (majority view; [name withheld] dissenting would confine it to physical activities). Sending electronic images of naked body parts via the internet constitutes 'exposing' under s 63B(1)(b)(i). A volunteer who has authority to determine attendance at events has authority to determine significant aspects of terms and conditions of employment for the purposes of the 'position of authority' definition, even where the authority is not exercised and is forward-looking. The question whether 'sexual activity' extends to verbal communications remains subject to the dissent of [name withheld].
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