wireshark decode element in classmark3 information

wireshark decode < 8-PSK Struct>element in classmark3 information as fixed 5bits. but, is it right ?from 3GPP24.008 the structure of this element is

 < 8-PSK Struct> : :=
    < Modulation Capability : bit >
    { 0 | 1 < 8-PSK RF Power Capability 1: bit(2) > }
    { 0 | 1 < 8-PSK RF Power Capability 2: bit(2) > }

that means if <8-PSK Struct>=1，the following data length will be from 3 to 7 bis？