The change that's being proposed is under 144(1.1) of the Canada Labour Code, which now reads:
The Minister shall not be required to give testimony in a civil suit with regard to information obtained in the exercise of powers or the performance of duties or functions the Minister is authorized to exercise or perform under this Part
—which is part 2 of the Canada Labour Code—
except for those powers, duties or functions that shall not be the subject of an agreement entered into under subsection 140(2).