In April 1403, the seventeen-year-old Balša became the ruler of Zeta when his father Đurađ II died as a result of the injuries he had suffered at the Battle of Tripolje. As he was young and inexperienced, his main advisor was his mother, Jelena, a sister of the ruler of Serbia at the time, Stefan Lazarević. Under the influence of his mother, Balša reverted the order of the state religion, passing a law declaring Orthodox Christianity as the official confession of the state, while Catholicism became a tolerant confession.