REC Limited, a 'Maharatna' company under the Ministry of Power, Government of India and the National Test House (NTH), operating under the Department of Consumer Affairs, Government of India, signed a Memorandum of Understanding (MoU) on Wednesday at Krishi Bhavan, New Delhi, aimed at bolstering quality testing and assurance mechanisms for materials deployed under the Revamped Distribution Sector Scheme (RDSS).