A qualified person may apply to the Minister for a licence authorising him to engage in the business of producing, processing and selling seeds of a particular class or classes to which provisions of Part II of this Act apply. Part II applies to various specified classes of homegrown seeds. The Minister may attach to a licence such conditions, as he thinks proper, including conditions (sect. 12). No person shall sell, as seed for sowing, any seeds to which this Part applies unless: (a) he is the