A/HRC/5/21 page 17 (c) Its language is not abusive. However, such a communication may be considered if it meets the other criteria for admissibility after deletion of the abusive language; (d) It is submitted by a person or a group of persons claiming to be the victims of violations of human rights and fundamental freedoms, or by any person or group of persons, including non-governmental organizations, acting in good faith in accordance with the principles of human rights, not resorting to politically motivated stands contrary to the provisions of the Charter of the United Nations and claiming to have direct and reliable knowledge of the violations concerned. Nonetheless, reliably attested communications shall not be inadmissible solely because the knowledge of the individual authors is second-hand, provided that they are accompanied by clear evidence; (e) It is not exclusively based on reports disseminated by mass media; (f) It does not refer to a case that appears to reveal a consistent pattern of gross and reliably attested violations of human rights already being dealt with by a special procedure, a treaty body or other United Nations or similar regional complaints procedure in the field of human rights; (g) Domestic remedies have been exhausted, unless it appears that such remedies would be ineffective or unreasonably prolonged. 88. National human rights institutions, established and operating under the Principles Relating to the Status of National Institutions (the Paris Principles), in particular in regard to quasi-judicial competence, may serve as effective means of addressing individual human rights violations. C. Working groups 89. Two distinct working groups shall be established with the mandate to examine the communications and to bring to the attention of the Council consistent patterns of gross and reliably attested violations of human rights and fundamental freedoms. 90. Both working groups shall, to the greatest possible extent, work on the basis of consensus. In the absence of consensus, decisions shall be taken by simple majority of the votes. They may establish their own rules of procedure. 1. Working Group on Communications: composition, mandate and powers 91. The Human Rights Council Advisory Committee shall appoint five of its members, one from each Regional Group, with due consideration to gender balance, to constitute the Working Group on Communications.