The authority in this case (the school) told the private company that their policy allowed these types of signs.
But...
Her, lawyer, Tom Simon, said that “the school district obviously claims that they had nothing to do with this, that this was her private employer that did this. But, clearly, in the information that we’re gathering, there were reports from teachers complaining about it. That moved up a little bit and eventually it came to her supervisor who said ‘you’re done.’”
That doesn't sound to me like they were "allowing" it. But instead harassing and silencing dissenting opinion through abuse of their authority.
