MID and East Antrim council chief Anne Donaghy is expected to give evidence if called to a Stormont committee investigating the suspension of post-Brexit checks at ports.
A majority at the Agriculture, Environment and Rural Affairs committee backed a Sinn Féin proposal to conduct an inquiry after former DUP minister Edwin Poots withdrew department staff in Larne, Belfast and Warrenpoint last week.
The decision meant that physical inspections of some produce were not carried out.
Staff began a phased return to inspection work on Wednesday.
The move to halt inspections came after Mid and East Antrim Borough Council re-deployed employees involved in physical checks at Larne Port following the appearance of threatening graffiti in the seaside town and claims that car registrations had been taken down.
At a meeting of party group leaders last Monday, Ms Donaghy is understood to have said the UDA was behind threats.
Police have said there was no evidence that loyalist paramilitary groups are behind the threatening graffiti or that workers’ car registrations had been recorded.
It is understood that Ms Donaghy, Mr Poots, police and trade unions could be called to give evidence at the committee.
Ms Donaghy this week faced calls to fully explain the decision to withdraw council inspection staff from Irish Sea border checks.
Asked if the chief executive would give evidence to the Stormont committee, a council spokesman last night indicated she would attend.
A spokesman for the DUP was unable to clarify if Mr Poots, who is currently receiving treatment for cancer, will attend.
A PSNI spokeswoman said it "will fully cooperate with any NI Assembly inquiry if requested to do so”.
North Antrim Sinn Féin MLA Philip McGuigan proposed the investigation at a committee meeting this week.
He has said "serious questions" remain over the decision of Mid and East Antrim council to withdraw staff "on reports of threats".
“We need clarification on what information the department and the council was operating from and basing their decisions on if it was not the information given by the PSNI,” he said.
