All over the world each country's Law, though with some differences, provides that the mark is valid if used by its owner or by third parties with the owner's consent. In some countries this consent can be tacit, whereas in other countries it must be expressed in writing by granting a License, which several national legislations require to be recorded with their respective Patent and Trade Mark Offices. In such cases only when the License has been recorded the use of the mark by the Licensee has the same effect as its proprietor's one, thus preventing the mark from lapsing for non-use.