Why not just do your research, in fact, the most basic research, and find out what is in the selective service act before any additional speculation?
Easier said than done?
The following from http://www.sss.gov/PDFs/MSSA-2003.pdf
To determine the corresponding MSSA section to each U.S. Code section listed, subtract 450 from the Code section. Therefore, for example, Code section 451 is section 1 in the MSSA; Code section 453 is section 3 in the MSSA; Code section 462 is section 12 in the MSSA. Exceptions: Code section 471(a) converts to MSSA section 22; Code section 472 converts to MSSA section 23; and Code section 473 converts to MSSA section 24. Note: The MSSA, as published in 50 U.S.C. App. 451 et seq., can be found (with notes and the legislative history of amendments at the end of each section) at http://uscode.house.gov/usc.htm.