Democratic Sen. Heidi Heitkamp Mary (Heidi) Kathryn HeitkampCentrists, progressives rally around Harris pick for VP 70 former senators propose bipartisan caucus for incumbents Susan Collins set to play pivotal role in impeachment drama MORE (D-N.D.) is pressing the Department of Transportation (DOT) for clarity over a new rule requiring truckers to electronically log their hours.

In a Tuesday letter to Transportation Secretary Elaine Chao Elaine Lan ChaoChick-fil-A drops fight for San Antonio airport location Overnight Defense: US marks 19th anniversary of 9/11 attacks | Trump awards Medal of Honor to Army Ranger for hostage rescue mission | Bahrain, Israel normalizing diplomatic ties Trump marks 9/11 with moment of silence on Air Force One, remarks in PA MORE, Heitkamp said she is worried that agricultural stakeholders have not had enough input in the administration’s efforts to impose the rule.

“Based on feedback I have received from my constituents, I am very concerned that this rule does not take into consideration the realities of transporting livestock, insects and perishable produce, and that it will affect recreational horse users that are not involved with the commercial trucking industry,” Heitkamp wrote.

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“DOT’s one-size-fits-all approach fails to take into account the uniqueness of these industries, and I request you provide more clarity and exemptions to the rule to address these situations.”

The new rule, which mandates truckers use electronic logging devices rather than paper to record driving hours, went into effect Dec. 18. But the administration gave truckers until April 1 to comply with the requirement, which is meant to adhere to hours-of-service rules and help improve safety.

Heitkamp in her letter said there is “uncertainty” surrounding whether or not the rule applies to “agriculture and recreational uses” like transporting cattle for rodeos.

The North Dakota lawmaker, who is up for reelection this year in a state President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE won by nearly 38 points, said she backs a delay in imposing the rule on commercial vehicles moving insects or livestock.

“The delay will give the FMCSA time to make necessary adjustments to hours of service rules that address trip start time and animal welfare concerns,” Heitkamp said, referring to the Federal Motor Carrier Safety Administration, which issued the rule.

On Tuesday, the FMCSA said it will provide another 90-day waiver from the regulation for agricultural transports.

“We continue to see strong compliance rates across the country that improve weekly, but we are mindful of the unique work our agriculture community does and will use the following 90 days to ensure we publish more helpful guidance that all operators will benefit from,” Administrator Ray Martinez said in a statement.

Groups opposing the rule argue it's too costly for the trucking industry to implement. The Owner-Operator Independent Drivers Association, which says truckers faced technical issues due to electronic logging, last month called on the House Transportation and Infrastructure Committee to hold an oversight hearing on the regulation.

This story was updated at 3:48 p.m.