72Period of effect of government certificate

72  Period of effect of government certificate  (1) A government certificate in relation to a kind of goods takes effect:  (a)  on the date it is issued; or  (b) if a later date is stated in the certificate—on that later date.  (2) A government certificate that relates to a single consignment of goods remains in force until the earlier of the following:  (a) any expiry date specified in the certificate;  (b) the day the certificate is accepted, or rejected, by the importing country.  (3) A government certificate that relates to 2 or more consignments of goods remains in force until the earliest of the following:  (a) any expiry date specified in the certificate;  (b) the day any consignment of the goods is rejected by the importing country;  (c) the day on which the last consignment of the goods is accepted by the importing country.  (4) Despite subsections (2) and (3), a government certificate in relation to a kind of goods ceases to be in force if:  (a) the goods are no longer intended to be exported to the country in relation to which the certificate was issued; or  (b) the certificate is revoked; or  (c) circumstances prescribed by the rules exist.