The arbitrator will force your company to comply with the agreement shortly. They can only get away with this for a short time.
That is not the point.
They agreed to it just weeks before, BBB made a press statement about how hard the pilots worked to come up with a better solution to the month-to-month transition conflicts and said both sides were extremely pleased with the result.
It is not a gray area in the new CBA, there is a diagram with several examples, they complied with this section for 24 hours before changing their minds.