Prohibition on sole selling agents: government may ban appointments where demand exceeds supply and approvals required. The Central Government may prohibit appointment of sole selling agents by notification where demand for specified goods substantially exceeds supply and sole selling services are unnecessary. Appointments of persons or entities with a substantial interest in the company require prior Central Government approval, and companies above a paid-up capital threshold must also secure a special resolution. The section extends analogous provisions to sole buying agents, prescribes particulars for approval applications, includes transitional compliance requirements for pre-existing appointments, and defines substantial interest by reference to beneficial shareholding aggregations.