Complex sentence: This was the first occasion on which the Assembly authorized economic, diplomatic and cultural sanctions against a state; it had already authorized military sanctions by its resolution 1001 of 7 November 1956, during it's first emergency special session.
Split into simpler sentences: This was the first occasion on which the Assembly authorized economic, diplomatic and cultural sanctions against a state. It had already authorized military sanctions by its resolution 1001 of 7 November 1956, during the UNGA's first emergency special session.