18 211 M e m be rs of t he T e c hni c a l W ork i ng G roup I n o r de r t o pur sue t he pur pose s of t he C onsor t i um t he A ss e m bl y sha l l e st a bl i sh a T e c hni c a l W or k G r oup c om pose d of one or m or e vol unt a r y Me m be r R e p r e se nt a t i ve s ha vi n g t he a ppr op r i a t e e x pe r t i se f or t he pur po se of di sc ha r g i n g t he de si gna t e d f unc t i on of t ha t W or k G r oup a s pr e se nt e d i n A nne x 3 or ot he r w i se a ppoi nt e d f r om t i m e t o t i m e b y t h e A ss e m bl y t o f ul f i l a pa r t i c ul a r f unc t i o n 212 C hai rpe rs on I n t he e ve nt w he r e t he T e c hni c a l W or ki ng G r o up ha s m or e t ha n 3 t hr e e m e m be r s t he m e m be r s sha l l e l e c t a m ong st t he m se l ve s a C ha i r pe r son f or a pe r i od of 1 one y e a r T he C ha i r pe r son sha l l c oor di na t e t he T e c hni c a l W or ki ng G r oup or ga ni z e i t s w or k w i t h t he a ss i st a nc e of t h e S e c r e t a r i a t a nd sha l l a c t a s t he of f i c i a l r e pr e se nt a t i ve of t h e W or k G r oup 213 E x t e rnal i nde pe nde nt e x p e rt s I f a bud g e t ha s g r a nt e d t he T e c hni c a l W or ki n g G r oup m a y i f i t c onsi de r s i t ne c e ss a r y c o opt a n e x t e r na l i nde pe nde nt e x pe r t t o r e vi e w pr oposa l s be f or e t he y a r e put t o t he A ss e m bl y f or a ppr ov a l 22 R ol e of t he T e c hni c a l W ork i ng G roup T he ke y r ol e o f t he T e c h ni c a l W or ki ng G r oup c o m pr i se s a A dvi se on sc i e nt i f i c a nd t e c hni c a l m a t t e r s t o c om pl y w i t h R E A C H b A dvi se on t he I D c a r d of t he subs t a nc e pr oduc t a t st a ke c P e e r r e vi e w t he e x t e r na l c onsul t a nt s a na l y si s of da t a ga ps t e st i n g r e c o m m e nda t i ons a nd pr e pa r e pr opos a l s f or f ur t he r t e st i n g a nd i nf o r m a t i on g a t he r i ng d A dvi se on t he se l e c t i on o f e x t e r na l l a bor a t or i e s t o c onduc t t he t e st i ng p r o g r a m m e e S upe r vi se t he pe r f or m a n c e of t he t e st i n g pr o gr a m m e P r opose a L e a d R e gi st r a nt s g E nsur e t he pr e pa r a t i on of t he T e c hni c a l D oss i e r s f or R e g i st r a t i on h E nsur e t he pr e pa r a t i on of t he C he m i c a l S a f e t y R e p or t s i E nsur e t he pr e pa r a t i on of a ha r m oni se d C l a ss i f i c a t i on a nd L a be l l i n g i n a c c or da n c e w i t h t he G l oba l l y H a r m o ni se d S y st e m i f r e l e va nt 23 M e e t i ngs of t he T e c h ni c al W or k i ng G roup