"grandfather rights" meaning in English

{
  "forms": [
    {
      "form": "grandfather right",
      "tags": [
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "p",
        "sg": "grandfather right"
      },
      "expansion": "grandfather rights pl (normally plural, singular grandfather right)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He was able to drive a 7.5-tonner using his grandfather rights, as he obtained his driving licence before the law was changed.",
          "type": "example"
        },
        {
          "ref": "2021 January 27, Industry Insider, “Surplus to requirements”, in RAIL, number 923, page 68",
          "text": "What is described as 'grandfather rights' has allowed older equipment to continue in operation where a financial case cannot be made to adopt new regulations. But such dispensations are inevitably time limited and ultimately a decision to replace or modify them must be made.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Rights granted because of a pre-existing right or privilege, e.g. before a change in the law."
      ],
      "id": "en-grandfather_rights-en-noun-abNkhuwc",
      "tags": [
        "plural",
        "plural-normally"
      ]
    }
  ],
  "word": "grandfather rights"
}

{
  "forms": [
    {
      "form": "grandfather right",
      "tags": [
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "p",
        "sg": "grandfather right"
      },
      "expansion": "grandfather rights pl (normally plural, singular grandfather right)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English pluralia tantum",
        "English terms with quotations",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "He was able to drive a 7.5-tonner using his grandfather rights, as he obtained his driving licence before the law was changed.",
          "type": "example"
        },
        {
          "ref": "2021 January 27, Industry Insider, “Surplus to requirements”, in RAIL, number 923, page 68",
          "text": "What is described as 'grandfather rights' has allowed older equipment to continue in operation where a financial case cannot be made to adopt new regulations. But such dispensations are inevitably time limited and ultimately a decision to replace or modify them must be made.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Rights granted because of a pre-existing right or privilege, e.g. before a change in the law."
      ],
      "tags": [
        "plural",
        "plural-normally"
      ]
    }
  ],
  "word": "grandfather rights"
}