A ny   p r o visio n of  t h i s  Agreeme nt  t h a t  i s held to be invalid, illegal   or   u ne n f o rceabl e  i n   a ny  juris d ictio n   s h all ,  a s  t o   suc h  jurisdicti on, be  i n effectiv e  t o  t he  e x te nt  o f  suc h invalidity, illegality or   un e n forcea b ilit y  wit ho u t affecting the validity, legality or enforceability of t he  remai n i ng   p r o visi ons  hereof ,   a nd the invalidity i n   a ny  juris d icti on shal l   n o t  i n vali d at e  o r  re n de r   u ne n forceabl e  suc h   p r o visi on i n  a ny   o t h e r   j u risdicti on.    T he  partie s  shal l  e nd eav or  i n   g ood  fait h   neg o tiati o n s  t o  re p lac e  t he  invali d, illega l   or   un e n f o rceabl e  pr o visi ons  wit h   vali d p r o visi o n s  th e  ec ono mi c  effec t  o f  w h ic h   c o me s  a s  cl o s e  a s   po ssibl e  t o   tha t of  th e  i n vali d,  illega l   or   u ne n f o rceabl e  pr o visi on s.