{
  "url": "https://openlegislation.uk/trade-marks-rules-2008/rule-21",
  "json_url": "https://openlegislation.uk/trade-marks-rules-2008/rule-21.json",
  "legislation": "uksi/2008/1797",
  "legislation_title": "The Trade Marks Rules 2008",
  "legislation_url": "https://openlegislation.uk/trade-marks-rules-2008",
  "path": "rule/21",
  "kind": "rule",
  "number": "21",
  "heading": "Procedure for intervention",
  "text": "(1) If the opposition or part of it is based on the relative grounds for refusal set out in section 5(1), (2) or (3), any person in paragraph (3) may file an application to the registrar on Form TM27 for leave to intervene and the registrar may, after hearing the parties concerned if so required, refuse such leave or grant leave upon such terms and conditions (including any undertaking as to costs) as the registrar thinks fit.\n(2) Any person granted leave to intervene shall, subject to any terms and conditions imposed in respect of the intervention, be treated as a party to the proceedings for the purposes of the application of the provisions of rules 19, 20 and 62 to 73.\n(3) The persons referred to in paragraph (1) are—\n(a) where the opposition is based on an earlier trade mark, a licensee of that mark; and\n(b) where the opposition is based on an earlier collective mark or certification mark, an authorised user of that mark.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Rule 21 in force at 1.10.2008, see rule 1"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2008/1797/rule/21",
    "retrieved_at": "2026-10-29T03:28:07.429295+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}