20 Those parties that now wish to enter the Communist International but have not yet radically altered their previous tactics must, before they join the Communist International, see to it that no less than two thirds of the central committee and of all their most important central institutions consist of comrades who even before the Second Congress of the Communist International spoke out unambiguously in public in favour of the entry of the party into the Communist International. Exceptions may be permitted with the agreement of the Executive Committee of the Communist International. The Executive Committee of the Communist International also has the right to make exceptions in relation to the representatives of the centrist tendency mentioned in paragraph 7.