A/HRC/33/29 to ensure that there is a clear, precise, accessible, comprehensive and nondiscriminatory legal framework. Information and communications technology companies should allow surveillance of individuals on their platforms only when ordered to do so following judicial intervention. 66. An approach based on strengthening the rule of law, with appropriate checks and balances, is essential for the legality and legitimacy of any measures and programmes to prevent and counter violent extremism. They should be based on human rights impact assessments and subject to meaningful oversight through independent and effective mechanisms set up at the national level. Constant monitoring and regular review will help to ensure that these measures and programmes achieve their goals and that any negative impact on human rights is promptly addressed. Such monitoring and review should be conducted in an inclusive manner and with meaningful and free civil society involvement. There is also a need for accessible accountability processes that enable resorting to justice and accessing remedies. 19