4. The Commission may, by means of implementing acts, and following a substantiated request of the competent authority of a Member State, grant time-limited derogations from the end dates or cut-off dates set out in Annex V for a specific case where it is demonstrated in the derogation request that no technically and economically feasible alternative is available for that particular application. The Commission shall include reporting requirements in those implementing acts and shall require the submission of supporting evidence necessary for monitoring the use of the derogation, including evidence on quantities of halons recovered for recycling or reclamation, results of leak checks and quantities of unused halons in stocks. Those implementing acts shall be adopted in accordance with the examination procedure referred to in Article 28(2).