The assembly drafting Egypt's new constitution voted on Thursday to keep "principles of sharia" - Islamic law - as the main source of legislation, language unchanged from the previous constitution in force under former president Hosni Mubarak.
The issue was the subject of a long dispute between hardline Salafi Islamists and liberals in the assembly which will vote on each of 234 articles in the draft constitution before it is sent to President Mohamed Morsi for approval.
After that, Mr. Morsi must put it to a popular referendum.
The Muslim Brotherhood, the Islamist group that nominated Mr. Morsi for the presidency, hopes that quick approval of the constitution will help end a crisis ignited by a decree that expanded his powers.
While Article Two of the constitution - describing the source of legislation - stays the same, the constitution includes new provisions explaining what is meant by "the principles" of Islamic law, known as sharia.
The assembly also approved a new article that states that Al-Azhar, a seat of Sunni Muslim learning, must be consulted on "matters related to the Islamic sharia".
The final draft makes historic changes to Egypt's system of government. For example, it sets a limit on the number of terms a president may serve to two. Mr. Mubarak stayed in power for three decades.
It also introduces a degree of civilian oversight over the powerful military establishment, although not enough for some critics of the document.
The process has been plagued by disputes between the Islamists who dominate the body writing the constitution and secular-minded parties who say the Muslim Brotherhood and its allies have marginalised them in the process.
Prominent assembly members including former Arab League Secretary-General Amr Moussa have withdrawn from the assembly, as have representatives of Egypt's Coptic Church.