| Albania | In Force | |
| Algeria | In Force | |
| Antigua and Barbuda | In Force | |
| Argentina | In Force | |
| Australia | In Force | |
| Bahamas | In Force | |
| Bangladesh | In Force | |
| Barbados | In Force | |
| Belgium | In Force | |
| Belize | In Force | |
| Benin | In Force | |
| Bosnia and Herzegovina | In Force | |
| Brazil | Not in force | Awaiting declaration of acceptance |
| Bulgaria | In Force | |
| Cabo Verde | In Force | |
| Canada | In Force | |
| Chile | In Force | |
| China | In Force | |
| China - Hong Kong Special Administrative Region | Not applicable | Awaiting declaration of acceptance |
| Congo | In Force | |
| Cook Islands | Not in force | Awaiting declaration of acceptance |
| Croatia | In Force | |
| Cyprus | In Force | |
| Denmark | In Force | |
| — Faroe Islands | Applicable | |
| Djibouti | Not in force | Awaiting declaration of acceptance |
| Estonia | Not in force | The amendments of 2018 to the MLC, 2006 have been accepted and will enter into force for Estonia on 07 Oct 2022 |
| Ethiopia | Not in force | Awaiting declaration of acceptance |
| Fiji | In Force | |
| Finland | In Force | |
| France | Not in force | France has indicated that it will be bound by the amendment(s) only after a subsequent express notification of their acceptance – Article XV, para. 8, a) |
| — New Caledonia | Not applicable | New Caledonia has indicated that it will be bound by the amendment(s) only after a subsequent express notification of their acceptance – Article XV, para. 8, a) |
| Gabon | In Force | |
| Gambia | Not in force | Awaiting declaration of acceptance |
| Germany | In Force | |
| Ghana | In Force | |
| Greece | In Force | |
| Grenada | Not in force | Awaiting declaration of acceptance |
| Honduras | In Force | |
| Hungary | In Force | |
| Iceland | Not in force | Awaiting declaration of acceptance |
| India | In Force | |
| Indonesia | In Force | |
| Iran (Islamic Republic of) | In Force | |
| Ireland | In Force | |
| Italy | In Force | |
| Jamaica | In Force | |
| Japan | In Force | |
| Jordan | In Force | |
| Kenya | In Force | |
| Kiribati | In Force | |
| Latvia | In Force | |
| Lebanon | In Force | |
| Liberia | In Force | |
| Lithuania | In Force | |
| Luxembourg | In Force | |
| Malaysia | In Force | |
| Maldives | In Force | |
| Malta | In Force | |
| Marshall Islands | In Force | |
| Mauritius | In Force | |
| Mongolia | In Force | |
| Montenegro | In Force | |
| Morocco | In Force | |
| Mozambique | Not in force | Mozambique ratified the MLC, 2006, as amended in 2018. The amendments will enter into force for Mozambique on 25 May 2022. |
| Myanmar | In Force | |
| Netherlands | Not in force | Netherlands has indicated that it will be bound by the amendment(s) only after a subsequent express notification of their acceptance – Article XV, para. 8, a) |
| — Curaçao | Not applicable | Curaçao has indicated that it will be bound by the amendment(s) only after a subsequent express notification of their acceptance – Article XV, para. 8, a) |
| New Zealand | In Force | |
| — Tokelau | Not applicable | |
| Nicaragua | In Force | |
| Nigeria | In Force | |
| Norway | In Force | |
| Oman | Not in force | Oman ratified the MLC, 2006, as amended in 2018. The amendments will enter into force for Oman on 29 Mar 2023. |
| Palau | In Force | |
| Panama | In Force | |
| Philippines | In Force | |
| Poland | In Force | |
| Portugal | Not in force | Portugal has indicated that it will be bound by the amendment(s) only after a subsequent express notification of their acceptance – Article XV, para. 8, a) |
| Republic of Korea | In Force | |
| Romania | In Force | |
| Russian Federation | In Force | |
| Saint Kitts and Nevis | In Force | |
| Saint Vincent and the Grenadines | In Force | |
| Samoa | In Force | |
| San Marino | Not in force | San Marino ratified the MLC, 2006, as amended in 2018. The amendments will enter into force for San Marino on 30 Mar 2023. |
| Senegal | Not in force | Awaiting declaration of acceptance |
| Serbia | In Force | |
| Seychelles | In Force | |
| Sierra Leone | Not in force | Sierra Leone ratified the MLC, 2006, as amended in 2018. The amendments will enter into force for Sierra Leone on 29 Mar 2023. |
| Singapore | In Force | |
| Slovakia | In Force | |
| Slovenia | Not in force | Slovenia has indicated that it will be bound by the amendment(s) only after a subsequent express notification of their acceptance – Article XV, para. 8, a) |
| South Africa | In Force | |
| Spain | In Force | |
| Sri Lanka | In Force | |
| Sudan | Not in force | Awaiting declaration of acceptance |
| Sweden | In Force | |
| Switzerland | In Force | |
| Thailand | In Force | |
| Togo | In Force | |
| Tunisia | In Force | |
| Tuvalu | In Force | |
| United Kingdom of Great Britain and Northern Ireland | In Force | |
| — Bermuda | Applicable | |
| — British Virgin Islands | Not applicable | Awaiting declaration of acceptance |
| — Cayman Islands | Applicable | |
| — Falkland Islands (Malvinas) | Not applicable | Awaiting declaration of acceptance |
| — Gibraltar | Applicable | |
| — Isle of Man | Applicable | |
| United Republic of Tanzania | Not in force | Awaiting declaration of acceptance |
| Viet Nam | In Force | |
