GMTOK (16-byte bit string)

Message token.

This is a reserved field; its value is not significant. The following special value is defined:

MTKNON

No message token.

The value is binary zero for the length of the field.

The length of this field is given by LNMTOK. The initial value of this field is MTKNON. This field is ignored if GMVER is less than GMVER3.