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The Associated Press
Egypt's legislature meets for the first time in three years, a 596-seat chamber packed with supporters of President Abdel-Fattah el-Sissi, Cairo, Sunday, Jan. 10, 2016. The assembly, elected in November and December, is also the first elected chamber since el-Sissi, as military chief, led the ouster of President Mohammed Morsi in 2013 following massive protests against the Islamist leader and his Muslim Brotherhood. (Lobna Tarek, El -Shorouk Newspaper via AP)

CAIRO — Egypt's first legislature in more than three years, a 596-seat chamber packed with supporters of President Abdel-Fattah el-Sissi, held its inaugural session on Sunday, signaling the completion of a political road map announced after the 2013 military overthrow of an elected Islamist president.

The assembly, elected in November and December, is the first legislature since el-Sissi, as military chief, led the 2013 ouster of President Mohammed Morsi following mass protests against the Islamist leader and his Muslim Brotherhood. The new parliament replaces one dominated by Islamists that was dissolved by a court ruling in June 2012.

The new chamber's first task will be to ratify some 300 presidential decrees issued by el-Sissi since taking office in June 2014 and Interim President Adly Mansour before him. Under the constitution, these decrees must be ratified within 15 days starting from the date of the inaugural session. Failure to do so will result in the automatic repeal of the laws.

The decrees include a law severely restricting street demonstrations and a terror law that curbs press freedoms and gives police sweeping powers.

Sunday's session was supposed to be a mostly procedural one, with lawmakers taking the oath and electing a speaker and two deputies. But heated arguments between lawmakers broke out when an outspoken member, Murtada Mansour, strayed from the text of the oath to avoid endorsing the Jan. 25, 2011 uprising against autocrat Hosni Mubarak.

Mansour, an el-Sissi supporter and president of one of Egypt's top soccer clubs, changed the part of the oath where lawmakers pledge respect for the constitution, saying instead he will respect the "clauses of the constitution," thus avoiding implicit support for the charter's prologue. That part of the document contains praise for both the 2011 revolt as well as the so-called "June 30 revolution," a reference to the wave of massive street demonstrations that led to Morsi's ouster on July 3, 2013.

The dispute reflects an ongoing and divisive argument in Egypt regarding the legitimacy and legacy of the original 2011 uprising. Many pro-el-Sissi politicians and media figures, like Mansour, now brand the 2011 revolt as a mistake — fueled and funded by external powers and foreign agents seeking to weaken Egypt. Other el-Sissi supporters regard both Mubarak's and Morsi's ousters as legitimate revolutions. Few in the public sphere are willing to criticize the "June 30 revolution" that eventually brought el-Sissi to power.

Interim speaker Bahaa Abu Shaqah demanded that Mansour read the official text of the oath, but he refused.

"I don't recognize January 25, that is my prerogative," a visibly angry Mansour said over the shouts of other lawmakers. "I will read it, but it is the first oath that I took which comes from the heart," he said, when he finally relented and read the official text. Mansour, however, sparked another row when he hurriedly and causally read the oath.

Sunday's oath controversy harkened back to the inaugural session of the 2012 legislature, when ultraconservative Salafi lawmakers insisted on adding to the end of the oath the phrase "as long as it does not clash with God's law."

After Morsi's overthrow, El-Sissi announced three steps to take Egypt back to democratic rule: The adoption of a new constitution and presidential and parliamentary elections.

But the process has unfolded against the backdrop of a harsh crackdown on Islamists and secular and the leftist pro-democracy activists who fueled the 2011 uprising. Thousands have been jailed and hundreds of Islamists killed in a series of clashes with security forces in 2013 and 2014. The Muslim Brotherhood, which swept every election following Mubarak's ouster, is officially branded a terrorist group.

Turnout for last year's parliamentary elections was around 30 percent, and most of those elected to the assembly support the president.

On Sunday, el-Sissi vowed to support the chamber and respect the separation of powers, according to a statement issued by his office. Under the constitution adopted in 2014, perhaps Egypt's most liberal, the legislature has the right to impeach the president and sack the prime minister, albeit under strict conditions.

A pro-el-Sissi coalition in parliament, called "Supporting Egypt," enjoys the support of at least 300 lawmakers. It is designed to ensure continued support for the president and thwart any attempt to hinder his policies.

El-Sissi, who is expected to address the chamber later this month, has since his election in 2014 been focused on restoring security and reviving the nation's ailing economy.

Egypt is grappling with an increasingly potent Islamist insurgency centered in the northern part of the Sinai Peninsula, which claimed the downing of a Russian passenger plane over Sinai in October that killed all 224 people on board and led to widespread flight cancellations, dealing a major blow to the vital tourism industry.

Egypt's economy is barely staying afloat, with its local currency, the pound, under pressure, tourism battered from years of turmoil and inflation at nearly 11 percent.