CAIRO — Egypt’s Parliament on Tuesday passed amendments to the Constitution that could allow President Abdel Fattah el-Sisi to remain in power until 2030.

The vote, which sends the amendments to a national referendum, was seen by critics as another step back to authoritarianism, eight years after a pro-democracy uprising ended Hosni Mubarak’s three-decade rule.

The 596-member assembly, packed with Mr. el-Sisi’s supporters, overwhelmingly gave its initial approval in February.

“Today we are concluding what we started in February,” Speaker Ali Abdel-Al said at the beginning of Tuesday’s session. “In this great day, we offer to the Egyptian people a draft bill of the constitutional amendments.”