If the situation so requires, and in view of the danger of the introduction of infections or contagious diseases at the Bulgarian border posts, certain vehicles must undergo disinfection. This disinfection is part of the duties of the competent authorities at the border posts, and the relevant charges are detailed in the Tariff for the charges, which are collected by the National Veterinary-medical Service. As from 1.01.2006 the charges for disinfection of foreign-registered passenger vehicles are as follows: