An example of the operation of the first of the exceptions mentioned above would be an exempt orphanage operating a retail store and selling to the general public, where substantially all the work in carrying on such business is performed for the organization by volunteers without compensation. An example of the second exception would be a laundry operated by a college for the purpose of laundering dormitory linens and the clothing of students. The third exception applies to so-called thrift shops operated by a tax-exempt organization where those desiring to benefit such organization contribute old clothes, books, furniture, etc., to be sold to the general public with the proceeds going to the exempt organization.
26 C.F.R. §1.513-2
Sec. 513 as amended by sec. 4, Act of July 14, 1960 (P.L. 86-667 , 74 Stat. 536); secs. 121 (b)(4) and (c), Tax Reform Act of 1969 (83 Stat. 536, 542)