The parties not be able to investigate how to do the collection of evidence

In judicial practice, the parties and their agents sometimes litigation for some reason may not be able to investigate the collection of evidence. If one of the following conditions, the parties and their agents can apply for the people's court proceedings investigating and collecting evidence;
(A) for investigating and collecting evidence relating to the State
Department store and the people's court shall, on its accessible files;
(B) involving state secrets, commercial secrets, personal privacy;
(C) the parties and their agents the proceedings due to objective reasons can not do on its own collection of other materials.