GWIC also works with the International Society on General Relativity and Gravitation (ISGRG) in some areas. ISGRG is an Affiliated Commission of IUPAP (designated AC2). The main scientific meetings of GWIC (the Amaldi Meeting on Gravitational Waves) and ISGRG (the GRxx series of conferences) were held together in Sydney in 2007 and will be held together again in Warsaw in 2013. The ISGRG also administers the GWIC Thesis Prize funds. The membership of GWIC includes a representative from ISGRG to ensure communication between the two organizations.