Exclusive mandate

An exclusive mandate is a governments assertion of its legitimate authority over a certain territory, part of which another government controls with stable, de facto sovereignty. It is also known as a claim to sole representation or an exclusive authority claim. The concept was particularly important during the Cold War period when a number of states were divided on ideological grounds.

1.1. Germany from 1949 to 1990 Federal Republic of Germany
For nearly all of the 41 years that Germany was split into two countries, the Federal Republic of Germany West Germany claimed to be the sole legitimate successor to the German Reich that existed from 1871 to 1945. This claim was initially based solely on the governments mandate by virtue of free elections. To that end, it claimed Berlin, capital of united Germany from 1871 to 1945, as its capital, with the provisional capital in Bonn.
In a statement made before the Bundestag, German Chancellor Konrad Adenauer asserted this mandate as early as October 21, 1949, in response to the constitution of the German Democratic Republic GDR coming into effect. The Secretary of State Summit of the three western powers on September 18, 1950 in New York City, supported Chancellor Adenauers claim.
When the Soviet Union proclaimed the sovereignty of the GDR, the West German Bundestag once again unanimously insisted that the Federal Republic was the sole legitimate representative of the German people. At the Treaties of Paris Pariser Vertrage, at which the Federal Republic of Germany was admitted into the North Atlantic Treaty Organization, the allied nations adopted the position which the three western allies had already confirmed at the Nine-Power Conference in London: that the Federal Republic had the exclusive right to act on behalf of the entire German people in matters of foreign policy. The western nations thereby recognized the Federal Republic as the only lawful government for Germany as a whole.
Aside from such considerations pertaining to international law, the reunification clause of the Basic Law suggested that international recognition of the German Democratic Republic was to be avoided, so as not to sever the constitutional mandate to a unified German state.
Until 1973, the Federal Republic took a strict line in claiming an exclusive mandate for all of Germany. Under the Hallstein Doctrine, the Federal Republic broke diplomatic relations with states that maintained diplomatic relations with the GDR, except for the Soviet Union. On different levels, such as in international sports, there were, however, a wide range of international cooperations which even led to unified German teams in six Olympic Games. Over time, especially after the election of a social-liberal coalition led by Willy Brandt in 1969, the exclusive mandate was softened, as it severely limited the Federal Republics domestic and international autonomy. Starting in 1973, under the Ostpolitik policy, the Federal Republic took the line that the Democratic Republic was a de facto government within a single German nation, in respect of which the Federal Republic was the sole representative de jure, but limited to its own territorial extent; hence relinquishing any claim to be de jure the government of Germany as a whole.
Judicially, an exclusive mandate had been claimed to have arisen from the proposition that the German state as a whole had been preserved, that only one German state could legitimately exist, and that one state was identical with the Federal Republic. The German Democratic Republic was therefore held to be an illegally constituted Soviet puppet state occupying territory that rightfully belonged to the Federal Republic, thus lacking autonomy. An alternate view held that the GDR was in a state of civil war with the FRG government, and therefore could not be recognized as a state under international law. A third, the so-called "umbrella state" theory, entails the existence of two fragment states under the umbrella of a single German nation that had been formed in 1871 and which had never actually been annihilated; this theory arose in the late 1960s and was maintained in a ruling of the Federal Constitutional Court of Germany of 31 July 1973 upholding the "Basic Treaty" by which relations between East and West Germany were normalised. Crucially, although the Constitutional Court reaffirmed the proposition that the pre-1945 German state had been preserved and organised, albeit partially, in the institutions of the Federal Republic, the Justices explicitly rejected the proposition that this would imply an exclusive mandate; ".identity does not require exclusivity".
With the admission of both German states to the United Nations in 1973, matters regarding the exclusive mandate were no longer relevant. Nevertheless, the Constitutional Court maintained that the Federal Republic continued to bear a responsibility for the whole German people; albeit that this responsibility could only be discharged in respect of Germans physically present in its territory or within its jurisdiction. Accordingly, the Federal Republic of Germany did not recognize a distinct citizenship for the German Democratic Republic; if East Germans presented themselves in West Germany, or at a West German embassy in a third country, they could obtain a West German passport. Generally, the Federal Republic considered East Germans to be German citizens under the old 1871–1945 all-German citizenship i.e. Bundesburger, citizens of West Germany. Refugees who fled from the GDR were therefore not deported, and automatically qualified for West German citizenship.
In addition, visitors from the GDR would receive a West German passport upon request, for example, in order to ease travel to the United States. After the fall of the Berlin wall in November 1989, East Germans were greeted with BegruSungsgeld 100 West German Deutsche Mark and could travel freely within West Germany, while West German access to the East was still hindered for some weeks by visa and the Mindestumtausch mandatory minimum exchange of 25 DM.

1.2. Germany from 1949 to 1990 German Democratic Republic 1949–90
The 1949 constitution of the German Democratic Republic also acknowledged that Germany was an indivisible republic, and thus there was only one German citizenship. The GDR, therefore, was also founded on the premise of being the de jure sovereign representative of all Germany. Initially, it regarded the West German regime as an illegally constituted NATO puppet state, a line accepted by most of the Eastern bloc. The GDR erected the Berlin Wall in 1961 partly to prevent Germans moving freely within Germany. In 1974, however, the reunification clause was stricken from the GDRs constitution. Thereafter, it regarded itself as a separate state from West Germany. The Communist regime collapsed in the fall of 1989. East Germany lingered on for another year until it declared its accession to the Federal Republic in the German reunification of 1990.

2. Ireland
The 1919-1921 Irish Republic and the Republic of Ireland from 1938-1999 both claimed the entire island of Ireland, including Northern Ireland which is part of the UK. Article 2 of the Irish Constitution stated, "The national territory consists of the whole island of Ireland, its islands and the territorial seas." In 1999, following the Good Friday Agreement, Ireland passed the Nineteenth Amendment which deleted Article 2.

3. Mainland China and Taiwan
The Republic of China ROC was established in mainland China in 1912 following the conclusion of the Xinhai Revolution which led to the collapse of the Qing dynasty. The Chinese Civil War that broke out in 1927 was fought between the Kuomintang-led ROC government and the Communist Party of China CPC.
Since the end of the Chinese Civil War in 1949, the de facto territories of the ROC are limited to the Taiwan Area which includes the island of Taiwan ceded to the Empire of Japan in 1895 by the Qing dynasty of China; handover to the Republic of China in 1945 and several other islands. Meanwhile, the Peoples Republic of China PRC, established in 1949 by the CPC, controls mainland China, Hong Kong and Macau. Officially, both the ROC and the PRC claim de jure sovereignty over all of China including Taiwan, and regard the other government as being in rebellion.
Until 1971, the ROC was the representative of "China" at the United Nations UN and was a permanent member of the UN Security Council with veto power. In 1971, the PRC replaced the ROC as the representative of "China" at the UN. Since 1972, the ROC was excluded from all UN subcommittees. After the UN switched recognition from the ROC to the PRC, many states followed suit. As of 2020, the ROC maintains official diplomatic relations with 14 UN member states and the Holy See; many other states maintain unofficial relations with the ROC. The UN formally designates ROC-held territories as "Taiwan, Province of China" as of 2020.
The ROC currently participates in numerous international events and organizations under the name "Chinese Taipei" while the World Trade Organization officially refers to ROC-controlled territories as the "Separate Customs Territory of Taiwan, Penghu, Kinmen and Matsu".
The exclusive mandate claim of the ROC has softened with the rise of Taiwanese nationalism and Taiwan independence movement. The ROCs sovereignty claim over areas under the control of the PRC is also not actively pursued under the pro-independence Democratic Progressive Party-led government.

4. Korea
When North Korea and South Korea were created within months of each other in 1948, both claimed sovereignty over the entire Korean peninsula. Both states claimed that the other was an unlawfully constituted puppet state of the United States and the Soviet Union, respectively. In 1991, however, both nations joined the UN, as part of their reconciliation policy.

5. Vietnam
The Democratic Republic of Vietnam was proclaimed in 1945; the Republic of Vietnam gained its independence from France in 1954. While elections were intended to be held in 1955 to reunite the country, they never took place. For the next 20 years, both staked claims to all of Vietnam, claiming that the other was an illegally constituted puppet state. This continued until South Vietnam unconditionally surrendered to North Vietnam in 1975.
When some European countries such as Switzerland started recognizing North Vietnam towards the end of the Vietnam war, South Vietnam did not interrupt its diplomatic relations with them. Switzerland thus recognized North Vietnam in 1971 but also turned its consulate in Saigon South Vietnam into an embassy until the end of the war in 1975.
In 1979, Vietnam invaded and occupied Cambodia at that time was ruled by the Khmer Rouge as Democratic Kampuchea establishing the Peoples Republic of Kampuchea, but it was dismissed by the Peoples Republic of China as a "puppet state". At the time, both of the countries had disputed the claims of being the sole legitimate representative of all the Khmer people of Cambodia in the United Nations. This resulted in its seat being retained by the Coalition Government of Democratic Kampuchea, a coalition government formed in 1982 as a government in exile and composed of the royalist FUNCINPEC party, the republican Khmer Peoples National Liberation Front and the Khmer Rouge-backed Party of Democratic Kampuchea.

6. Syria
A similar situation occurred at the start of the Syrian Civil War in March 2011 when two governments claimed sovereignty over the whole Syria: The Syrian government headed by Bashar al-Assad and the various opposition groups seeking to remove Assad consisting of the National Coalition for Syrian Revolutionary and Opposition Forces, Syrian National Council and the Syrian Interim Government. Both entities are considered puppet entities backed by the Russian Federation/Iran and the United States/Saudi Arabia.
In addition, the Islamic State of Iraq and the Levant ISIS/ISIL, a Sunni Islamist fundamentalist militant group, controlled part of the Syrian territory along with portions of neighbouring Iraq.
In a more ambiguous situation, the Kurdish territory of northeast Syria became controlled by Syrian Kurdish federal state Rojava when Syrian government forces left the area, or areas were liberated from ISIL occupation.