Citing concerns for security and timeliness, election officials in North Carolina have stalled on decisions dealing with replacing voting machines not backed by paper ballots ahead of 2019 and 2020 elections, The News & Observer reported.

The North Carolina General Assembly passed a law in 2013 requiring all counties in the state to implement voting systems that utilize physical ballot backups. These include paper ballots and voting machines that back votes made digitally with physical records.

The North Carolina State Board of Elections website states that state law requires any touch-screen voting machines without paper ballot backing to be decertified by Dec. 1, 2019.

Three companies, Election Systems & Software, Clear Ballot and Hart InterCivic, are all seeking approval to provide machines for elections, but officials chose to hold decisions until they figure out specifics of ownership for each company.

Robert Cordle, chairman of the State Board of Elections, cited Special Counsel Robert Mueller’s report, which indicated that some North Carolina counties’ election software may have been compromised in the 2016 election.

“I believe this follows along with the cyber security concerns we have found in the Mueller report and other documentation that has been furnished to our board,” Cordle said, according to The News & Observer.