16 Where a Commissioner is a Judge that Judge's sitting time should be limited and be   the   subject   of   careful   negotiation   and   agreement   at   the   time   of   the appointment.    Advisory Role 58.    The evaluator recommends that the Law Commission should devote resources to advisory work on legal and legislative problems within Government, simply because  this  contributes  to  the  improved  quality  of  the  Statute  Book.    In particular it should play an active role in the Legislation Advisory Committee.   Careful  management  techniques  must  be  applied  to  ensure  that  this  does  not cause energy to be diverted from its major references so they are not produced on time.  The priority to be given to such advisory work should be the subject of discussions  with  the  Attorney-General.    No  more  than  15  percent  of  the Commission's outputs should bedevoted to such work.    Other Roles for the Law Commission 59.    An  Annual  Report  should  be  prepared  by  the  Law  Commission  on  the systematic  review  of  the  law,  in  which  general  observations  could  be  made about defects in the development of New Zealand law.    60.    The  capacity  of  the  Commission  to  undertake  work  involving  large  and fundamental  change  ought  to  be  considered  by  Government.    It  is  in  a  better position to carry out such work than Government Departments.    Commission Procedures 61.    Internal  debate  within  the  Law  Commission  should  not  cause  delays  in  the completion  of  a  project.    But  if  there  is an appropriate collegiate approach to decision-making  at  the  Law  Commission,  Commissioners  who  have  not  been primarily involved in projects should, nevertheless, be able to add value to them in the Commission's deliberations.    62.    The  Law  Commission  should  review  its  internal  procedures  to  ensure  it  can meet its deadlines.