Many volunteers contribute to the PILP, often by doing legal research that informs case strategy. The PILP works with one or more knowledgeable volunteers on each case file. They organise and work along a case, helping the PILP bring about social and legal change.
PILP is a project of the Dutch Section of the International Commission of Jurists (NJCM). Many of the people who are involved in PILP were already members of the NJCM. Others have become a member of the NJCM after being involved in PILP, because they want to support the organisation or actively contribute to one of its working groups.