In presidential systems such as the United States, appointments are appointed solely at the discretion of the President, but this appointment often has to be confirmed by the legislature; and particularly in the United States, the Senate must approve the appointment of leaders and judges by a simple majority.  In some cases, a particular style is required to house an imperfect state, z.B. the title of Sardar-i-Riyasat was used in Kashmir after its accession to India, and the head of the Palestine Liberation Organization, Jaser Arafat, was appointed the first “President of the Palestinian Authority” in 1994. In 2008, the same post was transformed into “president of the State of Palestine.”  In medieval Europe, it was generally recognized that the Pope was the first place among all sovereigns and followed the emperor of the Holy Roman Empire.  The Pope also had the exclusive right to determine the primacy of all others.   This principle was first challenged by a Protestant ruler, Gustav Adolf of Sweden, and then maintained by his country at the Congress of Westphalia.  Britain later claimed in 1718 a break from the old principle of the four-man alliance.  [Note 2] But it was only at the Congress in Vienna in 1815, when it was decided (due to the abolition of the Holy Roman Empire in 1806 and the weak position of France and other Catholic states to impose themselves) and that all sovereign states, be they monarchies or republics, were treated on the same level.  When several heads of state or their representatives meet, priority is generally determined by the host in alphabetical order (regardless of the language of the host, whereas French was the lingua franca of diplomacy for much of the 19th and 20th centuries) or after the date of accession.
 International law of contemporary priority, based on the principles generally recognized since 1815, stems from the Vienna Convention on Diplomatic Relations (particularly Articles 13, 16.1 and iii).  Heads of state are expected at home, which they make shine through their presence on various occasions, at para. For example, by participating in artistic or sporting performances or competitions (often in a theatrical box of honour, on a platform, in the front row, at the table of honour), exhibitions, national holidays, dedicating ceremonies, military parades and war memorabilia, important funerals, visits to different parts of the country and people from different areas of life. , and sometimes perform symbolic actions like cutting a ribbon, pickaxe, boat baptism, laying the first stone.