T = Type, L = Length, V = Value
Lc = Compressed Length, Vc = Compressed Value
: = optional field, | = mandatory field

+---------+---------+                 +---------+
|  Msg T  |  Msg L  |                 |  Msg Lc |
+---------+---------+---------+       +---------+
| Name T  | Name L  | Name V  |       | Name Vc |
+---------+---------+---------+       +---------+---------+
: CBPfx T : CBPfx L :                 : FWDH Lc : FWDH Vc :
+---------+---------+                 +---------+---------+
: MBFr T  : MBFr L  :                 |  HPL V  |
+---------+---------+---------+  ==>  +---------+---------+
: FWDH T  : FWDH L  : FWDH V  :       :  APM Lc : APM Vc  :
+---------+---------+---------+       +---------+---------+
: NONCE T : NONCE L : NONCE V :       : NONCE V :
+---------+---------+---------+       +---------+
:  ILT T  :  ILT L  :  ILT V  :       :  ILT Vc :
+---------+---------+---------+       +---------+
:  HPL T  :  HPL L  :  HPL V  :
+---------+---------+---------+
:  APM T  :  APM L  :  APM V  :
+---------+---------+---------+