1. A breach of public law duty by an organ of state can be transposed into a private law delictual breach where multiple factors are satisfied, including: the existence of constitutional obligations (particularly sections 7(2) and 12(1)(c)), the absence of other effective remedies, moral indignation evoked by the breach, and consonance with constitutional values including accountability.
2. Public carriers like PRASA have a legal duty to protect passengers from physical harm arising from both the carrier-passenger relationship and their public law obligations as organs of state.
3. The standard of care applicable to organs of state is that of a "reasonable organ of state" assessed in light of available resources and constitutional obligations, not that of a "reasonable person".
4. An organ of state cannot rely on bald assertions of resource constraints to escape liability - it must provide detailed information about resource constraints, alternative measures explored, and reasons for decisions taken to enable a court to assess reasonableness.
5. In negligence, it is not necessary to foresee the precise mechanism by which harm occurs - it is sufficient if harm of the same general type or nature was reasonably foreseeable.
6. Where an organ of state fails to implement a basic safety measure that requires no additional resources (such as closing train doors while in motion) and this facilitates harm to a person, factual causation is established on a balance of probabilities if the harm would not have occurred had the measure been implemented.
7. Legal causation (proximity) is established where the harmful conduct occurred within the defendant's sphere of control, the breach involved constitutional rights, moral indignation is aroused, and the preventative measure would have required no extra cost.