Amendment 3 to Recommendation ITU-T G.984.3 (2008) aligns gigabit-capable passive optical network (G-PON) security with the enhanced security control features supported in Recommendation ITU-T G.988. It also introduces a new PON-ID maintenance capability, as well as new physical layer operations, administrations and maintenance (PLOAM) functions: broadcast POPUP to Operation state, and relative equalization delay adjustment.