The Baha'i New Year's day on 21 March is usually a time for celebration but for one South Australian Baha'i the festivities this year were tinged with sadness. Adelaide businessman Amin Tavakkoli spent the day with family and members of his local Baha'i community but he could not help his thoughts turning to his brother Behrouz, who is incarcerated in a crammed cell in a notorious jail in Iran. He has been locked up for his faith for nearly three years. Before their arrest, Behrouz Tavakkoli, 59, and six colleagues had been serving as leaders of the 300,000 members of the Baha'i Faith in Iran with the knowledge and tacit consent of the authorities…