Else, if the Label-stack-depth is 0 and the Target FEC Stack sub-TLV
at FEC stack-depth is 38 (PeerAdj SID sub-TLV), {

    Set the Best-return-code to 10, "Mapping for this FEC is not
    the given label at stack-depth <RSC>" [RFC8029].  Check if 
    any below conditions fail:

           -  Validate that the receiving node's BGP Local AS matches
              with the remote AS field in the received PeerAdj SID
              sub-TLV.

           -  Validate that the receiving node's BGP Router-ID
              matches with the Remote Router ID field in the
              received PeerAdj SID sub-TLV.

           -  Validate that there is an EBGP session with a peer
              having a local AS number and BGP Router-ID as
              specified in the local AS number and Local Router-ID
              field in the received PeerAdj SID sub-TLV.

    If the remote interface address is not zero, validate the
    incoming interface.  Set the Best-return-code to 35, 
    "Mapping for this FEC is not associated with the incoming 
    interface" [RFC8287].  Check if any below conditions fail:

           -  Validate that the incoming interface on which the
              OAM packet was received matches with the remote
              interface specified in the PeerAdj SID sub-TLV.

    If all above validations have passed, set the return code to 3,
    "Replying router is an egress for the FEC at stack-depth <RSC>"
    [RFC8029].
    }

Else, if the Target FEC Stack sub-TLV at FEC stack-depth is 39
     (PeerNode SID sub-TLV), {

    Set the Best-return-code to 10, "Mapping for this FEC is not
    the given label at stack-depth <RSC>" [RFC8029].  Check if any 
    below conditions fail:

       -  Validate that the receiving node's BGP Local AS matches
          with the remote AS field in the received PeerNode SID 
          FEC sub-TLV.

       -  Validate that the receiving node's BGP Router-ID matches
          with the Remote Router ID field in the received
          PeerNode SID FEC.

       -  Validate that there is an EBGP session with a peer
          having a local AS number and BGP Router-ID as
          specified in the local AS number and Local Router-ID
          field in the received PeerNode SID FEC sub-TLV.

    If all above validations have passed, set the return code to 3,
    "Replying router is an egress for the FEC at stack-depth <RSC>"
    [RFC8029].
    }
Else, if the Target FEC Stack sub-TLV at FEC stack-depth is 40
     (PeerSet SID sub-TLV), {

    Set the Best-return-code to 10, "Mapping for this FEC is not
    the given label at stack-depth <RSC>" [RFC8029].  Check if any 
    below conditions fail:

       -  Validate that the receiving node's BGP Local AS matches
          with one of the remote AS fields in the received 
          PeerSet SID FEC sub-TLV.

       -  Validate that the receiving node's BGP Router-ID matches
          with one of the Remote Router ID fields in the 
          received PeerSet SID FEC sub-TLV.

       -  Validate that there is an EBGP session with a peer having
          a local AS number and BGP Router-ID as specified in the
          local AS number and Local Router-ID fields in the received 
          PeerSet SID FEC sub-TLV.

    If all above validations have passed, set the return code to 3,
    "Replying router is an egress for the FEC at stack-depth <RSC>"
    [RFC8029].
    }