A bulletin published in the kingdom's official gazette said the cabinet had approved giving joint-stock status to Aramco effective January 1, 2018.
The move comes as the kingdom prepares to sell under five per cent of state-owned Aramco, the crown jewel of its economy, in what is expected to be the world's largest ever initial public offering.
The flotation forms the cornerstone of a reform drive led by Crown Prince Mohammed bin Salman to wean the economy off its reliance on oil.
A provisional board of directors -- Aramco's first ever -- will be appointed based on the recommendation of the kingdom's oil minister, the bulletin said.
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It will be followed at a later date by "the formation of a board of directors under the provisions of the founding statute".
The statement did not specify if the board would be elected or appointed.
The state will retain direct ownership of the majority of Aramco shares, according to the gazette.
Aramco CEO Amin Nasser has said the IPO is scheduled for the second half of 2018.
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