Country	Format number
Afghanistan	C2
Åland Islands	C1
Albania	C20
Algeria	C1
American Samoa	C7
Andorra	C1
Angola	C8
Anguilla	C9
Antigua and Barbuda	C22
Argentina	C1
Armenia	C1
Aruba	C8
Ascension Island	C36
Australia	C7
Austria	C38
Azerbaijan	C1
Bahamas	C14
Bahrain	C9
Bangladesh	C9
Barbados	C9
Belarus	C38
Belgium	C1
Belize	C8
Benin	C8
Bermuda	C9
Bhutan	C9
Bolivia	C8
Bonaire	C14
Bosnia-Hercegovina	C1
Botswana	C15
Brazil	C6
British Antarctic Territory	none
British Virgin Islands	C40
Brunei Darussalam	C9
Bulgaria	C1
Burkina Faso	C1
Burundi	C8
Cambodia	C26
Cameroon	C8
Canada	C7
Cape Verde	C1
Cayman Islands	C33
Central African Republic	C8
Chad	C8
Chile	C1
China	C1, C9
Christmas Island	C7
Cocos (Keeling) Islands	C7
Colombia	C9
Comoros	C8
Congo (Democratic Republic of - Kinshasa)	C1
Congo (Republic of the - Brazzaville)	C8
Cook Islands	C34
Costa Rica	C16
Croatia	C1
Cuba	C1
Curaçao	C14
Cyprus	C1
Czechia / Czech Republic	C1
Denmark	C1
Djibouti	C8
Dominica	C8
Dominican Republic	C1
East Timor	C9
Ecuador	C17
Egypt	C18
El Salvador	C19
Equatorial Guinea	C8
Eritrea	C8
Estonia	C1
Ethiopia	C1
Faeroe Islands / Faroe Islands	C1
Falkland Islands	C2
Fiji	C8
Finland	C1
France	C1
French Guiana	C1
French Polynesia	C1
Gabon	C8
Gambia	C8
Georgia	C1
Germany	C1
Ghana	C8
Gibraltar	C2
Greece	C1
Greenland	C1
Grenada	C8
Guadeloupe	C1
Guam	C7
Guatemala	C43
Guernsey	C2
Guinea	C39
Guinea-Bissau	C1
Guyana	C8
Haiti	C1
Holy See	C6
Honduras	C6
Hong Kong	C10
Hungary	C3
Iceland	C1
India	C9
Indonesia	C9
Iran	C1
Iraq	C2
Ireland	C4
Isle of Man	C2
Israel	C1
Italy	C6
Ivory Coast	C8
Jamaica	C11
Japan	C12
Jersey	C2
Jordan	C9
Kazakhstan	C3
Kenya	C47
Kiribati	C50
Kosovo	C1
Kuwait	C1
Kyrgyzstan	C3
Laos	C1
Latvia	C9
Lebanon	C9
Lesotho	C9
Liberia	C1
Libya	C8
Liechtenstein	C1
Lithuania	C1
Luxembourg	C1
Macao	C35
Madagascar	C1
Malawi	C1
Malaysia	C42
Maldives	C9
Mali	C8
Malta	C5
Marshall Islands	C7
Martinique	C1
Mauritania	C8
Mauritius	C9
Mayotte	C1
Mexico	C6
Micronesia	C7
Moldova	C1
Monaco	C1
Mongolia	C9
Montenegro	C1
Montserrat	C9
Morocco	C1
Mozambique	C1
Myanmar	C32
Namibia	C2
Nauru	C23
Nepal	C9
Netherlands	C1
New Caledonia	C1
New Zealand	C13
Nicaragua	C41
Niger	C1
Nigeria	C19
Niue	C2
Norfolk Island	C7
North Macedonia	C1
Northern Mariana Islands	C7
Norway	C1
Oman	C24
Pakistan	C9
Palau	C7
Panama	C26
Papua New Guinea	C19
Paraguay	C1
Peru	C49
Philippines	C6
Pitcairn Islands	name only required
Poland	C1
Portugal	C1
Puerto Rico	C9
Qatar	C8
Reunion	C1
Romania	C1
Russia	C45
Rwanda	C8
Saba	C14
Saint-Barthélemy	C1
Saint Helena	C36
Saint Kitts and Nevis	C51
Saint-Martin	C1
Saint Lucia	C9
Saint Pierre and Miquelon	C1
Saint Vincent and the Grenadines	C2
Samoa	C2
San Marino	C6
Sao Tome and Principe	C8
Saudi Arabia	C1
Senegal	C1
Serbia	C48
Seychelles	C22
Sierra Leone	C8
Singapore	C9
Sint Eustatius	C14
Sint Maarten	C14
Slovakia	C1
Slovenia	C1
Solomon Islands	C22
Somalia	C7
South Africa	C2
South Korea	C9
South Sudan	C17
Spain	C6
Sri Lanka	C2
Sudan	C17
Suriname	C8
Swaziland	C2
Sweden	C1
Switzerland (French-speaking)	C1
Switzerland (German-speaking)	C1
Switzerland (Italian-speaking)	C1
Syria	C8
Taiwan	C9
Tajikistan	C1
Tanzania	C1
Thailand	C27
Togo	C8
Tokelau	C46
Tonga	none
Trinidad and Tobago	C9
Tunisia	C1
Turkey	C1
Turkmenistan	C28
Turks and Caicos Islands	C34
Tuvalu	C52
Uganda	C8
Ukraine	C28
United Arab Emirates	C29
United Kingdom	C2
United States of America	C7
United States Virgin [[Islands	C7
Uruguay	C1
Uzbekistan	C30
Vanuatu	C8
Venezuela	C31
Vietnam	C9
Wallis and Futuna	C37
Western Sahara	C1
Yemen	C8
Zambia	C1
Zimbabwe	C8

C1) For: Aland Islands; Algeria; Andorra; Argentina; Armenia; Azerbaijan; Belgium; Bosnia-Hercegovina; Bulgaria; Burkina Faso; Cape Verde; Chile; China (some); Congo (Democratic Republic of - Kinshasa); Croatia; Cuba; Cyprus; Czechia / Czech Republic; Denmark; Dominican Republic; Estonia; Ethiopia; Faeroe Islands / Faroe Islands; Finland; France; French Guiana; French Polynesia; Georgia; Germany; Greece; Greenland; Guadeloupe; Guinea-Bissau; Haiti; Iceland; Iran; Israel; Kosovo; Kuwait; Laos; Liberia; Liechtenstein; Lithuania; Luxembourg; Madagascar; Malawi; Martinique; Mayotte; Moldova; Monaco; Montenegro; Morocco; Mozambique; Netherlands; New Caledonia; Niger; North Macedonia; Norway; Paraguay; Poland; Portugal; Reunion; Romania; Saint-Barthelemy; Saint-Martin; SAint Pierre and Miquelon; Saudi Arabia; Senegal; Slovakia; Slovenia; Sweden; Switzerland; Tajikistan; Tanzania, Tunisia; Turkey; Uruguay; Western Sahara; Zambia

Format C1

C2) For: Afghanistan; Falkland Islands; Gibraltar; Guernsey; Iraq; Isle of Man; Jersey; Namibia; Niue; Saint Vincent and the Grenadines; Samoa; South Africa; Sri Lanka; Swaziland; United Kingdom

Format C2

C3) For: Hungary; Kazakhstan; Kyrgyzstan

Format C3

C4) For: Ireland

Format C4

C5) For: Malta

Format C5

C6) For: Brazil; Holy See; Honduras; Italy; Mexico; Philippines; San Marino; Spain

Format C6

C7) For: American Samoa; Australia; Canada; Christmas Island; Cocos (Keeling) Islands; Guam; Marshall Islands; Micronesia; Norfolk Island; Northern Mariana Islands; Palau; Somalia; United States of America; United States Virgin Islands

Format C7

C8) For: Angola; Aruba; Belize; Benin; Bolivia; Burundi; Cameroon; Central African Republic; Chad; Comoros; Congo (Republic of the - Brazzaville); Djibouti; Dominica; Equatorial Guinea; Eritrea; Fiji; Gabon; Gambia; Ghana; Grenada; Guyana; Ivory Coast; Libya; Mali; Mauritania; Qatar; Rwanda; Sao Tome and Principe; Sierra Leone; Syria; Togo; Uganda; Vanuatu; Yemen; Zimbabwe

Format C8

C9) For: Anguilla, Bahrain; Bangladesh; Barbados; Bermuda; Bhutan; Brunei Darussalam; China (some); Colombia; East Timor; India; Indonesia; Jordan; Latvia; Lebanon; Lesotho; Maldives; Mauritius; Mongolia; Montserrat; Nepal; Pakistan; Puerto Rico; Saint Lucia; Suriname; Singapore; South Korea; Taiwan; Trinidad and Tobago;Vietnam

Format C9

C10) For: Hong Kong

Format C10

C11) For: Jamaica

Format C11

C12) For: Japan

Format C12

C13) For: New Zealand

Format C13

C14) For: Bahamas; Bonaire; Curacao; Saba; Sint Eustatius; Sint Maarten

Format C14

C15) For: Botswana

Format C15

C16) For: Costa Rica

Format C16

C17) For: Ecuador; South Sudan, Sudan

Format C17

C18) For: Egypt

Format C18

C19) For: El Salvador; Nigeria; Papua New Guinea

Format C19

C20) For: Albania

Format C20

C22) For: Antigua and Barbuda; Seychelles; Solomon Islands

Format C22

C23) For: Nauru

Format C23

C24) For: Oman

Format C24

C25) For: Panama

Format C25

C26) For: Cambodia; Panama

Format C26

C27) For: Thailand

Format C27

C28) For: Turkmenistan; Ukraine

Format C28

C29) For: United Arab Emirates

Format C29

C30) For: Uzbekistan

Format C30

C31) For: Venezuela

Format C31

C32) For: Myanmar

Format C32

C33) For: Cayman Islands

Format C33

C34) For: Cook Islands; Turks and Caicos Islands

Format C34

C35) For: Macao

Format C35

C36) For: Ascension Island, Saint Helena

Format C36

C37) For: Wallis and Futuna

Format C37

C38) For: Austria; Belarus

Format C38

C39) For: Guinea

Format C39

C40) For: British Virgin Islands

Format C40

C41) For: Nicaragua

Format C41

C42) For: Malaysia

Format C42

C43) For: Guatemala

Format C43

C44) Not currently required

Format C44

C45) For: Russia

Format C45

C46) For: Tokelau

Format C46

C47) For: Kenya

Format C47

C48) For: Serbia

Format C48

C49) For: Peru

Format C49

C50) For: Kiribati

Format C50

C51) For: Saint Kitts and Nevis

Format C51

C52) For: Tuvalu

Format C52