SAR ratings

Does anyone know how to interpret the FCC's SAR ratings for cell phones? They often differ from those posted by CNET. The FCC site gives 4 different numbers -- two for "Part 22" and two for "Part 24." For instance, CNET posts one SAR of .678 K/wg for the Sanyo 6600 ("katana"), whereas the FCC says this:

Power output listed is ERP for Part 22 and EIRP for Part 24. SAR compliance for body-worn operating configurations is based on a separation distance of 2.2 cm between the unit and the body of the user. End-users must be informed of the body-worn operating requirements for satisfying RF exposure compliance. Belt clips or holsters may not contain metallic components. SAR compliance was evaluated with the integral Bluetooth active. The highest reported SAR values are: Part 22- Head: 0.769 W/kg, Body-worn: 0.416 W/kg, Part 24- Head: 0.882 W/kg, Body-worn: 0.500 W/kg.

HELP!