They replace the former post-war regulations which concentrated on border control, specifically the health control of ships and their crews, and which included international vaccination against yellow fever, to which other vaccinations were subsequently added.
Deze regeling komt in de plaats van oudere, naoorlogse regelingen waarin de nadruk op grenscontrole lag, met name op gezondheidscontroles van schepen en hun bemanningen, en die de internationale vaccinatie tegen gele koorts omvatte, waaraan vervolgens andere vaccinaties werden toegevoegd.
