Delegatus non potest delegare - That which has been delegated cannot delegate further.⏎
Actori incumbit onus probatio - "On the plaintiff rests the proving". The burden of proof falls to the plaintiff, claimant, or petitioner.⏎
Contra non valentem agere nulla [or non] currit praescriptio - A statute of limitation does not run against those who cannot act; this is the basis of the American discovery rule limiting prescriptive limitation periods.⏎