A/HRC/21/34 (b) To ensure the presence of the State throughout the national territory, including the justice sector, to protect the population from violence and to grant all citizens the right to redress; (c) To adopt and implement a human rights-based approach to development by ensuring that human rights are integrated into programmes and policies; (d) To take all measures necessary to develop a robust legal framework for the promotion and protection of human rights in South Sudan and, in particular: (i) To ratify the main international and regional human rights instruments, including the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights; (ii) To ensure that national legislation, including the Constitution, is fully in line with relevant international human rights standards; (iii) To ensure that the application of customary law does not contradict international human rights standards; (iv) To support relevant institutions, such as the Constitutional Review Commission, the Law Review Commission, the Ministry of Justice and the Human Rights Committee of the National Assembly, and the implementation of recommendations of human rights mechanisms, including those made in the context of the universal periodic review; (e) To ensure that the fight against impunity is dealt with as a matter of priority; in this regard, the Government should: (i) Undertake a comprehensive reform of the security sector with a view to putting an end to violations committed by law enforcement officers, while empowering the South Sudan National Police Service with the tools to investigate crime and hold perpetrators to account; (ii) Support capacity-building of the judiciary and, in particular, the training of judges, prosecutors and lawyers; and establish legal aid mechanisms and ensure the right of victims to reparation; (iii) Assist the Human Rights Commission in the fulfilment of its mandate by ensuring adequate funding and technical assistance; (iv) Support the South Sudan National Prison Service, ensuring that it has adequate resources and capacity to provide a correctional service respectful of international standards. 14