Commission may adopt any technical provisions necessary for the operation of the temporary Cash-flow and Schengen Facility. The measures thus decided on shall be applicable forthwith, shall take account of the interest of all parties concerned and shall not entail frontier controls. Priority shall be given to such measures as will least disturb the functioning of the internal market. Such safeguard measures shall not be invoked as a means of arbitrary discrimination or a disguised restriction on trade between Member States. The measures shall be maintained no longer than strictly necessary and, in any case, shall be lifted when the relevant commitment is implemented. They may however be applied beyond the period specified in the first paragraph as long as the relevant commitments have not been fulfilled. In