1988 and September 1992 are annotated "NRZ" in the "Leased, rebuilt or sold to" column in the. NLPI Ltd. NLPI Limited, abbreviated from New Limpopo Projects Investments, a Mauritius-registered company, specialises in private sector investments by using the build-operate-transfer (BOT) concept. It had three connected railway operations in Zimbabwe and Zambia which formed a rail link between South Africa and the Democratic Republic of Congo. The Beitbridge Bulawayo Railway (BBR), commissioned on 1 September 1999, operates the Beit Bridge to Bulawayo line in Zimbabwe. Since February 2004, NLPI Logistics (NLL or LOG) operates between Bulawayo and Victoria Falls on the Zimbabwe-Zambia border. Since February 2003, the Railway Systems of Zambia (RSZ) operated on the former Zambian Railways (ZR) from Victoria Falls to Sakania in the Congo. In Zambia, the RSZ locomotive fleet included former ZR locomotives, but the rest of the locomotive fleet of all three operations consisted of South African GM-EMD Classes , and and GE Classes and locomotives from Spoornet and later TFR. These locomotives were sometimes marked or branded as either BBR or LOG or both, but their status, whether leased or loaned, was unclear since they were still on the TFR roster and still often worked in South Africa as well. Class locomotives which served with NLPI include the locomotives annotated "NLPI" in the "Leased, rebuilt or sold to" column in the table. Zambia Railways, the state-owned holding company, resumed control of the Zambian national rail network on 11 September 2012. This followed the Zambian government's decision to revoke the operating concession awarded to RSZ after Finance Minister Alexander Chikwanda claimed that RSZ had "blatantly disregarded the provisions of the agreement" and had been "acting in a manner prejudicial to the interests of Zambians”. Sheltam One of the Class locomotives, no. , was sold to Sheltam, a locomotive hire and repair company based at the Douglas Colliery near Witbank in Mpumalanga which undertakes complete operating contracts and maintenance contracts. By the turn of the millennium, Sheltam locomotives were operating at Randfontein Estates Gold Mine in Gauteng, in Mpumalanga at Douglas and Vandyksdrift Collieries and at SAPPI, Ngodwana. They also operated on Spoornet's Newcastle-Utrecht branch in KwaZulu-Natal and on Kei Rail in the Eastern Cape. Outside South Africa, they operated on the BBR, NLL and RSZ lines through Zimbabwe and Zambia and in the Democratic Republic of the Congo. Chemin de Fer Congo-Ocean Six Class locomotives were