The release of its report led to calls for a complete ivory trade ban, and at the seventh conference in 1989, the African Elephant was moved to appendix one of the treaty.
 before year 2000 Trading the ivory was soon to be seen as unlawful since the meeting furthering protecting a certain animal.
it happened in 1989 thus before 2000. And there was a ban on trading ivory as the animal called elpahants became more protected
( z1 see :ARG1 ( z2 trade :ARG1 ( z3 ivory ) ) :ARG2 ( z4 lawful :polarity - ) :time ( z5 soon ) :time ( z6 since :op ( z7 meet :ARG0-of ( z8 further :ARG1 ( z9 protect :ARG1 ( z10 animal :mod ( z11 certain ) ) ) ) ) ) :time ( z12 before :op ( z13 date-entity :year 2000 ) ) )