"convention country"

means a country, including any colony, protectorate or territory subject to the authority or under the suzerainty of any other country and any territory over which a mandate or trusteeship is exercised, which has signed and ratified, accepted or approved or has acceded to the International Convention for the Protection of New Varieties of Plants;

[Definition substituted by section 1(c) of Act No. 5 of 1980]