I'll grant you it was not clear but the implication was that if there is no contract, it could not control the matter.Taxing Matters;934397]The holder of the copyright may not have any contract with Facebook
by taking half the statement, you made the statement you quoted a stand alone statement and made the intent of the sentence you quoted to be one independent of anything else. It was not intended to be such. The implication is the situation is between the rights owner and Facebook and any contract (that may be) present. Obviously if there is no contract, there is no contract to control the situation and it defaults to the laws in place.Removing it or not from their FB page is not up to the infringed. It is based on the contract betwee Facebook and the owner of the copyrights.
If the holder has a contract with Facebook that contract might address this sort of situation, but that's not a given. One would have to read that contract.