shall furnish to the applicant a certificate of registration in Form 2 set out in the Seventh Schedule, which certificate shall specify the conditions with regard to the growing of the registered seed crop. (5) Unless the Certifying Authority decides otherwise, only one cultivar of the same species shall be permitted on the same farm. (6) The registered seed crop shall not exceed the approved hectarage by more than ten per cent, any excess over this amount shall be destroyed without compensation, immediately on the request of an authorised seed inspector. (7) The Certifying Authority shall keep a register of registered seed growers. (8) The grower shall plant the appropriate parent seed for the production of his registered seed class and shall keep a record of such parentage including certification labels and invoices as may be sufficient to satisfy the Certifying Authority in this respect. Field inspection 9. (1) Field inspection for the purpose of certification shall be conducted by persons authorised by the Certifying Authority to be seed inspectors. (2) A seed inspector conducting a field inspection shall refuse to certify a crop if he is satisfied that(a) the crop is so heavily contaminated with weeds, other species or disease as to render the crop unfit for seed or make inspection impracticable; or (b) the isolation distance or the standards relating to off-types and other cultivars, prescribed in the Fourth Schedule have not been complied with; or (c) for hybrids of maize, sorghum and sunflower there are more than three pollinating females per thousand plants; (d) the crop exceeds the approved and registered hectarage by more