 In 1924, the Macedonian Federative Organisation, then headed by him, reached an agreement with the IMRO, the so-called May Manifesto.The revelation that Bulgarian ultra-nationalist organisation as IMRO, officially sanctioned such a separatist and communist-influenced document, caused uproar in its ranks.After the IMRO revoked the agreement, Panitsa and the "federalists" participated by the foundation of the pro-communist IMRO (United), that was accepted as a partner in the Balkan Communist Federation and was sponsored directly by the Comintern.