What time lines are foreseen for new versions of the IPC?
New versions of the advanced level may enter into force on January 1, April 1, July 1, and October 1 of every year. However, a new version will only be published upon successful completion of advanced level revision projects. WIPO is obliged to notify offices and the general public at least 3 months in advance. New versions of the core level may enter into force every 3 years. WIPO is obliged to notify offices and the general public at least 6 months in advance.