Those are NOT the "REAL" rules of Part 15. That publication is merely a reference bulletin written primarily for the general public's understanding of the use of non-licensed wireless devices.
Here is a quote from that bulletin that validates what I just said.
This bulletin is intended to provide a general understanding of the FCC's regulations and policies
applying to products using low-power transmitters. It reflects the current text and interpretations of
the FCC's regulations. More detailed information is contained in the regulations themselves, which
can be found in Part 15 of Title 47 of the Code of Federal Regulations. [/b]This bulletin does not
or supersede those regulations.[/b]
The actual Part 15 rules can be found at http://www.fcc.gov/oet/info/rules/
and then follow the Federal Register link.