This principle is based on the premise that public health is better protected when the burden of proof is on the applicant since it has to prove that a particular subject matter is safe prior to its placing on the market, instead of the public authorities having to prove that a subject matter is unsafe in order to be able to ban it from the market.
Este principio da por sentado que la salud pública está mejor protegida cuando corresponde al solicitante demostrar que un determinado objeto es seguro antes de sacarlo al mercado, y no a los poderes públicos demostrar que no es seguro para entonces poder prohibir su comercialización.