"condition of carriage" meaning in English

{
  "forms": [
    {
      "form": "conditions of carriage",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "conditions of carriage"
      },
      "expansion": "condition of carriage (plural conditions of carriage)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "2021 July 28, Paul Clifton, “Network News: Confusion and dissent over face mask requirements: Reaction to the Guidance across the regions: London”, in RAIL, number 936, pages 8–9",
          "text": "Mayor Sadiq Khan [...] said masks on trains and buses would remain mandatory. \"We are making it a condition of carriage,\" he told the BBC. \"If you want to use our services, a condition of using them is that you wear a face mask. If you're not exempt, you can be refused entry.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A requirement that must be adhered to when travelling on public transport."
      ],
      "id": "en-condition_of_carriage-en-noun-s2BqdESQ",
      "links": [
        [
          "public transport",
          "public transport"
        ]
      ]
    }
  ],
  "word": "condition of carriage"
}

{
  "forms": [
    {
      "form": "conditions of carriage",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "conditions of carriage"
      },
      "expansion": "condition of carriage (plural conditions of carriage)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2021 July 28, Paul Clifton, “Network News: Confusion and dissent over face mask requirements: Reaction to the Guidance across the regions: London”, in RAIL, number 936, pages 8–9",
          "text": "Mayor Sadiq Khan [...] said masks on trains and buses would remain mandatory. \"We are making it a condition of carriage,\" he told the BBC. \"If you want to use our services, a condition of using them is that you wear a face mask. If you're not exempt, you can be refused entry.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A requirement that must be adhered to when travelling on public transport."
      ],
      "links": [
        [
          "public transport",
          "public transport"
        ]
      ]
    }
  ],
  "word": "condition of carriage"
}