a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS200 [Section] 5.4.3 [Statement text] 
Only if the Portlet's enduring state is modified and it is persisted on the Consumer should a PortletContext be returned to the Consumer and such a PortletContext MUST reference the portletHandle which was supplied by the Consumer.
WSRP v2.0 Specification
Statement text