New Delhi, Jun 17: Prime Minister Manmohan Singh today inaugurated a two-day conference of State Ministers of Welfare and Social Justice and asked them to ensure the implementation of Civil Rights Act's provisions and speedy trial of those who defy them. Dr Singh said it was imperative that the government implement the Protection of Civil Rights Act, 1955, and the Scheduled Caste and Scheduled Tribe (Prevention of Atrocities) Act, 1989.