CHARLESTON, W.Va. -- Time is running out for legislation that would set a fall vote for the seat held by the late U.S. Sen. Robert C. Byrd after it sat idle Sunday.

The Senate passed four more school-related bills from Gov. Joe Manchin's special session agenda. The House's Education Committee began reviewing separate education measures, advancing four of them.

But neither chamber acted on either version of the proposal that would put Byrd's seat on the Nov. 2 ballot following a special Aug. 28 primary.

One version awaits a final vote in the House of Delegates. The other has passed both chambers, but with dueling amendments that require a joint conference committee to resolve.

As West Virginia's elections chief, Secretary of State Natalie Tennant said her office could keep the tight timetable set out in either version if it wins final passage today.

"If they can get it passed tomorrow, we will be OK," Tennant said Sunday.

But that bill must also be written to take effect today. For now, only the Senate-passed version would do that. When the House approved the other version Saturday, supporters failed to muster the two-thirds majority needed for that effective date.

Without a bill, Manchin may still declare a special election, said Jim Pitrolo, his legislative liaison. Pitrolo cited the recent legal opinion from the state attorney general that concluded the governor had that power.

But Manchin may also do nothing, Pitrolo said.

The latter option would allow Manchin's temporary appointee to the seat, Carte Goodwin, to serve beyond November.

Manchin named Goodwin, his former chief counsel, on Friday under the premise that the 36-year-old would serve until a fall election. Goodwin will be sworn in Tuesday.

Byrd died June 28 with just over 30 months left in his term. The 92-year-old Democrat was history's longest-serving member of Congress, holding his Senate seat for more than a half-century.

Manchin has said it's highly likely he would run for the seat if there is an election. Manchin's probable candidacy has played a role in the special session debate, along with the special election's estimated $5.9 million cost.

The attorney general's opinion, meanwhile, has prompted some lawmakers to question the need for the legislation. A related, party-line debate centers on whether Rep. Shelley Moore Capito, the GOP's top prospect if there is an election, can run both for Byrd's seat and a sixth U.S. House term on the same ballot.

The education bills passed Sunday by the Senate include one that would redraw some of the in-school decision-making or advisory committees.

Another would require annual teacher evaluations. The remaining two would create pilot programs offering temporary pay boosts to educators and alternative settings for disruptive elementary and middle school students.