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.
Selle põhimõtte alus on eeldus, et rahvatervist kaitstakse paremini, kui tõendamiskohustuse koormus lasub taotlejal, kes peab enne turule laskmist tõendama, et konkreetne ese on ohutu, selle asemel, et riiklikud asutused peaksid tõendama selle ohtlikkust, et keelata selle turule laskmine.