For the purpose of providing a fund to defray the expenses of the examinations and analyses prescribed in this chapter, other than Article 11 hereof, each person selling or offering or ordering for sale or distribution in, or for export from, this State any seed mentioned in this chapter, other than Article 11 hereof, shall register his name with the Department of Agriculture and shall pay a license tax annually on January first of each year of one dollar when only boxed package vegetable or flower seed are handled and, when other seed with or without boxed package vegetable or flower seed is handled, of two and one-half dollars when the gross business is less than two hundred dollars, five dollars when the gross business is over two hundred dollars but less than five hundred dollars, ten dollars when the gross business is over five hundred dollars but less than one thousand dollars and twenty-five dollars when the gross business is one thousand dollars or more. The Commissioner's receipt for such license tax shall be a license to conduct the business.