to an identified or identifiable individual; “recipient” means a person to whom, or a public body to which, personal data are disclosed, whether a third party or not; “register” means the register referred to in section 20; “registration certificate” means the registration certificate referred to in section 16 (2); “restriction of processing” means the marking of stored personal data with the aim of limiting their processing in the future; “special categories of personal data”, in relation to a data subject, means personal data pertaining to – (a) his racial or ethnic origin; (b) his political opinion or adherence; (c) his religious or philosophical beliefs; (d) his membership of a trade union; (e) his physical or mental health or condition; (f) his sexual orientation, practices or preferences; (g) his genetic data or biometric data uniquely identifying him; (h) the commission or alleged commission of an offence by him; (i) any proceedings for an offence committed or alleged to