59 In view of the difficult questions involved in balancing and weighing conflicting values, international adjudicatory bodies make use of a practice of judicial restraint, often referred to as a margin of appreciation. This is due to the normative flexibility inherent in many international human rights norms, which may be interpreted and applied differently. Therefore, an international adjudicator may grant a degree of deference to the national authorities’ discretion which may notably be justified by the democratic legitimacy of the domestic decision-makers and their epistemic advantage that results from their familiarity with the local circumstances (see Shany, 2005, 908–10). While the margin of appreciation is best known as a doctrine employed by the European Court of Human Rights (ECtHR), similar practices can also be observed in UN human rights treaty bodies.
60 With regard to the HRC, a practice of deference has been identified notably concerning the application of the law to the facts, the restrictive interpretation where a normative consensus is absent, and a low degree of scrutiny of certain domestic decisions that involve balancing (Shany, 2017, 10–18). In a number of cases, the HRC has shown some deference towards the national authorities’ balancing of rights and interests (but cf McGoldrick, 2016, 59). However, the HRC has only once, in 1982, explicitly held that ‘a certain margin of discretion must be accorded to the responsible national authorities’ (Hertzberg v Finland, 1982, para 10.3). There, the HRC observed that ‘public morals differ widely’ and that there is ‘no universally applicable common standard’ (para 10.3).
61 In family and children rights cases, the HRC tends to defer to the national authorities if the domestic decision was based on an assessment of all the relevant circumstances (but cf Asensi Martínez v Paraguay, 2009, paras 5.3–7.5) because the domestic authorities are considered to be ‘generally competent to evaluate the circumstances of an individual case’ (Hendriks v Netherlands, paras 10.4–11; see also EB v New Zealand, 2007, para 9.5). However, the HRC has also made explicit that even where a state generally deserves a certain degree of deference, the HRC will not completely refrain from reviewing the domestic decision (see eg Shakeel v Canada, 2013, paras 8.4–8.6; Winata and Li v Australia, para 7.3; but cf Shakeel v Canada, Dissenting Opinion of Committee Member Shany, joined by Committee Members Flinterman, Kälin, Rodley, Seibert-Fohr, and Vardzelashvili).
62 Other treaty bodies also apply deference to the domestic authorities’ assessments. For instance, the CERD held, in a case concerning a domestic decision rejecting the disqualification of a juror who made inimical remarks, ‘that it is neither the function of the Committee to interpret the Norwegian rules on criminal procedure concerning the disqualification of jurors, nor to decide as to whether the juror had to be disqualified on that basis’ (Narrainen v Norway, 1994, para 9.5).
63 The CommEDAW also granted the Netherlands a margin of discretion in a particular case concerning an allegedly discriminatory system of maternity leave, arguing that ‘the Convention leaves to states parties a certain margin of discretion to devise a system of maternity leave benefits to fulfil Convention requirements’ and finding that the state’s choice was within the Convention standards (Nguyen v The Netherlands, para 10.2; but cf de Blok et al v The Netherlands, 2014, paras 8.7–8.9).
64 The CommRPD, for its part, has held ‘that, when assessing the reasonableness and proportionality of accommodation measures, State parties enjoy a certain margin of appreciation’ (Jungelin v Sweden, para 10.5) in order to conclude that it could not find a violation in a case concerning alleged workplace discrimination due to a public employer’s refusal to adapt computer systems to the applicant’s sight (at para 10.6; but cf Noble v Australia, 2016, para 8.6).
65 Regarding the CESCR, there is no practice as of yet. However, it should be pointed out that Article 8 (4) Optional Protocol to the CESCR implicitly acknowledges the justificatory basis of a doctrine of deference. Indeed, it states that ‘the Committee shall bear in mind that the State Party may adopt a range of possible policy measures for the implementation of the rights set forth in the Covenant’. The same wording was adopted in Article 10 (4) Optional Protocol to the CRC.
66 Finally, it should be noted that some Committees express their views through rather brief reasoning. This makes it hard to assess whether a Committee simply refrained from extensive reasoning or whether—and if so on what basis—it decided to defer to the respondent state’s decision and assessment (see eg Zentralrat Deutscher Sinti und Roma et al v Germany, 2008, paras 7.7–8).