New Palestinian leader Mahmud Abbas pledged to wipe out the "black stains" of his predecessor Yasser Arafat and reform political and security stuctures in an interview with Russian daily Kommersant published Tuesday. Abbas, who held talks with Russian leaders Monday to win support for his key upcoming summit with Israeli Prime Minister Ariel Sharon, said the main task of his new administration was to institute a rule of law. "Our main principle is the supremacy of the law. Our parliament is now passing laws on the reform of the security system and financial and administrative reform," Abbas told Kommersant. The moderate Palestinian Authority (PA) president, elected last month, conceded that under the rule of Arafat, "there were black stains in his policy."