213 (c) other institutions, if the processing is necessary to protect the spiritual, religious or philosophical welfare of the data subjects, unless they have indicated that they object to the processing. (2) In cases under subsection (1) (a), the prohibition shall not apply to processing of pelsonal information concerning the spirit, retigion or philosophy of life of family members of the data subjects, where - (a) (b) the association concerned maintains regular contact with those family members in connection with its aims; and the family members have given explicit consent in wr-iting to the processing. (3) Personal information concerning a data subject's spiritual, religious ol philosophical beliefs under subsections (1) and (2), shall not be supplied to thild parties without the consent of the data subject. Exemption on data subject's race 31. (1) The prohibition on processing personal information concerning a data subject's race shall not apply if the plocessing is carried out to - (a) identify data subjects and only when this is essential for' that purpose; and (b) comply with the law. (2) In the cases refened to under subsection (1), personal information shall not be supplied to third parties without the consent of the data subject. Exemption on data subject's trade union rnembership 32. (1) The prohibition on processing personal information on a data subject's trade union membership, sha1l not apply to the processing by the tracle union to which the data subject belongs or the tlade union federation to which tlrat trade union belongs, where the processing is necess ary to achieve the aims of the trade union or trade union fedelation.