means any assembly, concourse or procession of more than 15 persons in or on any public road as defined in the Road Traffic Act, 1989 (Act No. 29 of 1989), or any other public place or premises wholly or partly open to the air—
| (a) | at which the principles, policy, actions or failure to act of any government, political party or political organization, whether or not that party or organization is registered in terms of any applicable law, are discussed, attacked, criticized, promoted or propagated; or |
| (b) | held to form pressure groups, to hand over petitions to any person, or to mobilize or demonstrate support for or opposition to the views, principles, policy, actions or omissions of any person or body of persons or institution; including any government, administration or governmental institution; |