<P> ARTICLE III . Italy, Germany and Japan, even after the victorious conclusion of this war, will collaborate closely in the spirit of the Tripartite Pact, concluded Sept. 21, 1940, in order to realize and establish an equitable new order in the world . </P> <P> ARTICLE IV . The present accord is effective immediately on its signature and remains in force for the duration of the Tripartite Pact, signed Sept. 27, 1940 . The high contracting parties of this accord will at an opportune moment agree among themselves the means of implementing Article III above of this accord . </P>

When was tripartite pact signed what was its importance