for the purposes of section 11 (quotas), references to goods that are subject to a quota are to be read as including goods that are subject to a quota under equivalent provisions of customs legislation that are in force in the Bailiwick of Guernsey or, as the case may be, the Isle of Man or the Bailiwick of Jersey;

for the purposes of section 19 (reliefs), the reference to provision for full or partial relief from a liability to import duty is to be read as including provision for full or partial relief under equivalent provisions of customs legislation that are in force in the Bailiwick of Guernsey or, as the case may be, the Isle of Man or the Bailiwick of Jersey.