Oksana & Mel -- The Writing's On the Wall

9/25/2010 10:00 AM PDT
How's this for love, Hollywood style -- the "Cohabitation Agreement" Oksana Grigorieva and Mel Gibson signed requires each of them to give the other written notice in the event they break up ... or get back together.

According to the "Cohabitation Agreement" the pair signed back in December 2009, "The parties shall be deemed separated when either gives written notice to the other advising that he or she has elected to separate."

The same also holds true if they get back together: "After the parties separate, the parties may reconcile and resume their previous relationship if both parties give notice in writing of their intent to reconcile and resume their previous relationship."

Nothing says I love you ... like a notarized letter from your attorney.