What changes under new constitution plan?

If also passed in a second reading expected to start in the coming week, the constitution plan would then be put to a referendum likely in April and, if approved, would become law.

While critics say the move is part of a power grab by Erdogan for a one-man rule, supporters say it will simply put Turkey in line with France and the US and is needed for efficient government.

But what would change under the proposed 18-article draft constitution for the nation of 79 million?

More powers for Erdogan

Under the new constitution, the president would have strengthened executive powers to directly appoint top public officials including ministers.

The president would also be able to assign one or several vice presidents. The office and position of prime minister, currently held by Binali Yildirim, would be scrapped.

The current constitution, adopted in 1982 in the wake of the 1980 military coup, guarantees independence of the courts from an "organ, authority and office".

But the draft constitution would allow the president to directly intervene in the judiciary, which Erdogan has accused of being influenced by supporters of his ally-turned-foe, the Pennsylvania-based Islamic preacher Fethullah Gulen who is blamed for the July 15 failed coup.

The president and the parliament would together be able to choose four members of the Supreme Board of Judges and Prosecutors (HSYK), a key judicial council that appoints and removes personnel in the judiciary. The parliament would choose seven members on its own.

Military courts, which have convicted officers and even sentenced former prime minister Adnan Menderes to death following a 1960 coup, would in the future not be allowed.

State of emergency

Under the draft constitution, a state of emergency would be imposed in the event of an "uprising against the homeland" or "violent actions which put the nation in... danger of being divided," Anadolu Agency said.

Turkey's parliament on January 4 approved a government-backed motion to extend by another three months the state of emergency imposed in the wake of the July 15 failed coup against Erdogan.

More members of parliament

The number of members of the Turkish parliament would rise from 550 to 600. The minimum age limit for MPs would also be lowered from 25 to 18.

Legislative elections would take place once every five years -- instead of four -- and on the same day as the presidential elections.

The parliament would still have power to enact, modify and remove legislation. It would retain supervisory powers to write enquiries with help from an investigative authority.

It would also be able to oversee the president's performance but the latter would have authority to issue a presidential decree on all matters related to his executive powers.

If the president were accused or suspected of a crime, then parliament could request an investigation.

Longer Erdogan term?

The draft constitution states that the next presidential and parliamentary elections are to be held simultaneously on November 3, 2019.

The president would have a five year term with a maximum of two mandates.

Erdogan was elected president in August 2014 after over a decade as prime minister, in the first ever direct elections for a Turkish head of state.

But there have been suggestions that the clock on his presidency will start from zero from 2019 as the new constitution creates a new presidential role.

If this is so, Erdogan would be able to stay in power until 2029, not 2024. The president has yet to make explicitly clear whether this is the case.