REQUIRED SUPPLEMENTARY STEWARDSHIP INFORMATION (RSSI) - The category defined by the Board for reporting information required by the stewardship standards.
RSSI is defined by the board to report information.
This drop in payment mail volume accounts for 69 percent of the decline in the volume of HH-to-NHH sector, amounted to 3.6 billion pieces between 1990 and 1997 (see Table 1).