MT 549 Field Specifications
15. Field 16R: Start of Block
FORMAT
 Option R | 
 16c | 
PRESENCE
Mandatory in optional sequence B
DEFINITION
This field specifies the start of a block and the name of that block.
CODES
This field must contain the following code (Error code(s): T92):
 BYSTAREA | 
 Statement by Status/Reason and/or by Financial Instrument |