29 C.F.R. § 783.20
The Act provides a number of specific exemptions from the general requirements previously described. Some are exemptions from the overtime provisions only. Others are from the child labor provisions only. Several are exemptions from both the minimum wage and the overtime requirements of the Act. Finally, there are some exemptions from all three-minimum wage, overtime pay, and child labor requirements. An examination of the terminology in which the exemptions from the general coverage of the Fair Labor Standards Act are stated discloses language patterns which reflect congressional intent. Thus, Congress specified in varying degree the criteria for application of each of the exemptions and in a number of instances differentiated as to whether employees are to be exempt because they are employed by a particular kind of employer, employed in a particular type of establishment, employed in a particular industry, employed in a particular capacity or occupation, or engaged in a specified operation. (See 29 U.S.C. 203(d) ; 207 (b), (c), (h) ; 213 (a), (b), (c), (d) . And see Addison v. Holly Hill,322 U.S. 607 ; Walling v. Haden, 153 F. 2d 196, certiorari denied 328 U.S. 866 ; Mitchell v. Stinson, 217 F. 2d 210.) In general, there are no exemptions from the child labor requirements that apply in enterprises or establishments engaged in transportation or shipping (see part 570, subpart G of this chapter). Such enterprises or establishments will, however, be concerned with the exemption from overtime pay in section 13(b)(6) of the Act for employees employed as seamen and the exemption from the minimum wage and overtime pay requirements provided by section 13(a)(14) for employees so employed on vessels other than American vessels. These exemptions, which are subject to the general rules stated in § 783.21 , are discussed at length in this part.
29 C.F.R. §783.20