+------------------+
            +       PCE        <-----------+
            +----^-----------^-+           |
                 |           |             |
                 |           |             |
                 | +------+  |             |
 +-----------------+R3(RR)+--|-------------+
 |               | +------+  |       PCInitiate/PCRpt
 |               |           |             |
+--+      +--+   |           |   +--+    +-v+
|R1+------+R5+---+-----------|---+R6+----+R7|
++-+      +--+   |           |   +--+    +-++
 |       PCInitiate/PCRpt PCInitiate/PCRpt |
 |               |           |             |
 |            +--v--+     +--v-+           |
 +------------+- R2 +-----+ R4 +-----------+
              +--+--+     +--+-+