The law differentiates between posting of foreign staff from another member state of the European Economic Area and posting from a third country. Authorisation for posting must be applied for the posting of staff from companies having their registered seat in a third country. In general, such authorisation will only be granted if the work does not take longer than six months altogether and if the individual worker is not seconded for more than four months. Foreign workers who are seconded by a company having its headquarters in another member state of the European Economic Area in order to provide work in Austria on a temporary basis generally do not need authorisation for posting.