Since the AIMR-PPS standards were introduced in 1993, both investment management firms and investors have expanded their investing opportunities to reflect the increasingly global financial industry. After making several revisions to keep pace with globalization, including the introduction of the GIPS standards in 1999, CFA Institute took the final step to harmonize the AIMR-PPS and GIPS standards and announced the dissolution of the AIMR-PPS brand.
Effective 01 January 2006, the AIMR-PPS standards converged with the GIPS standards.
Source: www.cfainstitute.org