The capability of the OFDM PHY implementation to operate in the three U-NII bands. Coded as an integer value of a three bit field as follows: bit 0 .. capable of operating in the lower (5.15-5.25 GHz) U-NII band bit 1 .. capable of operating in the middle (5.25-5.35 GHz) U-NII band bit 2 .. capable of operating in the upper (5.725-5.825 GHz) U-NII band For example, for an implementation capable of operating in the lower and mid bands this attribute would take the value 3.