Division 1.2 Specific criteria

Live attenuated vaccines against infection with Newcastle disease virus must be prepared from a Newcastle disease virus strain for which the master seed has been tested and shown to have an ICPI of either:

1. (a)

   less than 0,4, if not less than 10⁷ EID₅₀ are administered to each bird in the ICPI test;

   or

2. (b)

   less than 0,5, if not less than 10⁸ EID₅₀ are administered to each bird in the ICPI test.