Table of contents
1. Only Ustrd OR Strd can be found, not both
2. Ustrd allowed to have only once occurence
3. Strd allowed to have only once occurence
4. When Issr "ISO" (ISO 11649), Ref must be given
5. Ref must be valid
6. If /RmtInf/Strd/ is given /RmtInf/Strd/CdtrRefInf/Tp/CdOrPrtry/Cd must have the value "SCOR"