PAG Y
                                          {Service-Specific Policy
                                                    for constraint
            Monitor LSP                                relaxation}
                 |                                          |
                 | PAG X                    PCReq/PCRpt     |    
                 V {Monitor LSP}            {PAG Y}         V 
              +-----+                   ----------------> +-----+
   _ _ _ _ _ _| PCE |                  |                  | PCE |
  |           +-----+                  |      ----------> +-----+
  | PCInitiate/PCUpd                   |     |    PCReq/PCRpt
  |{PAG X}                             |     |    {PAG Y}
  |                                    |     |
  |              .-----.               |     |         .-----.
  |             (       )              |  +----+      (       )
  |         .--(         )--.          |  |PCC1|--.--(         )--.
  V        (                 )         |  +----+ (                 )
+---+     (                   )        |        (                   )
|PCC|----(   (G)MPLS network    )   +----+     ( (G)MPLS network   )
+---+     (                   )     |PCC2|------(                   )
PAG X      (                 )      +----+       (                 )
{Monitor    '--(         )--'                     '--(         )--'
LSP}            (       )                             (       )
                 '-----'                               '-----'

Case 1: Policy requested by PCE        Case 2: Policy requested by 
        and enforced by PCC                    PCC and enforced by 
                                               PCE