21.—(1) Subject to regulations 5, 37 and 39 and Schedules 8 and 10, a producer shall furnish in accordance with this regulation a certificate of compliance to the appropriate Agency.
(2) A certificate of compliance shall be furnished as evidence of whether or not the producer has complied with his recovery and recycling obligations for a relevant year and shall be furnished on or before 31st January in the year immediately following the relevant year.
(3) The provisions of Schedule 4 shall apply as regards the information to be contained in a certificate of compliance.