Present situation of discussion among PAC, EPAC and APAC to make PAC, EPAC, and APAC to be held every third year to have only one of them be held in a year, and rotate the venue of these Particle Accelerator Conferences among three regions is presented. At present PAC and EPAC are held every second year: PAC in odd year and EPAC in even year. Three APACs that have ever been held were obliged to compete with either PAC or EPAC. Since EPAC has already decided to move to three-year cycle, APAC10 will become the only Particle Accelerator Conference in the year 2010. Being freed from competition with other PACs, APAC10 to be held in Kyoto in May 2010 will be the first APAC that is equivalent to PAC and EPAC in its size and scope.