{| class="wikitable"
|-
! Position !! Length !! Type !! Description 
|-
| 0x00 || 0x04 || string || Identifier (SCRL)
|-
| 0x04 || 0x04 || uint || Size in bytes
|-
| 0x08 || 0x04 || uint || Either fully F or 0
|}
Only present 2 times in sm2, but in sm1 it's common.