Turkey no longer has a prime minister. The president, whose office was largely ceremonial up until now, is now chief executive. The president is responsible for appointing and dismissing vice-presidents, ministers and senior officials. He decides how many there will be, and parliament has no say in these matters. Members of his cabinet are not allowed to be lawmakers.
Rule by decree
The president can issue decrees that become legally binding once they are published in the government's official bulletin. Parliamentary approval is not needed. If parliament does adopt a related law, the decree then becomes invalid. Presidential decrees may not curtail constitutional rights or impact existing legal regulations. With the exception of the budget draft, only parliament may introduce bills.
President and majority leader in parliament
Before the reform, the president was committed to political neutrality; now, he may remain affiliated to a party. The president is thus the head of the largest party, which makes him majority leader – he effectively controls parliament. Erdogan reassumed party leadership of the AKP in May 2017.
Going forward, parliamentary and presidential elections will take place on the same day, in both cases for five-year terms. Scheduling the elections on the same day increases the likelihood that the president's party will have the majority in parliament. Sunday's vote was originally planned for November 2019, but Erdogan pulled it forward.
Two terms and more
Technically, the president can only serve for two five-year terms. But the governing AKP has created a loophole: If parliament decides to hold new elections during the president's second term, the latter is allowed to run once more. Under the new presidential system, previous terms don't count, giving Erdogan a fresh start. Using the loophole, he could theoretically stay in power until 2033.
Fewer rights for parliament
Turkish lawmakers have lost their right to dismiss ministers. Parliamentary inquiries must be made in writing, and not to the president but to the vice-presidents and ministers. Lawmakers could start impeachment proceedings against the president, not just for treason but for any criminal offence. The hurdles are high, however. A two-thirds majority of all lawmakers is required to refer an investigation to the judiciary.
High hurdle for smaller parties
The highly controversial 10 percent threshold to enter parliament, which disadvantages pro-Kurdish parties in particular, remains unchanged.
Limited judicial independence
The constitutional reform gives the president more control over the judiciary. He appoints six of the 13 members of the Council of Judges and Prosecutors, which in turn appoints judges and prosecutors. Parliament, where the president is majority leader, chooses the council's other members. Under the previous system, legal professionals themselves chose most members of the 22-member body. Turkey's military courts have already been abolished.