PPA AO 12-2019, meanwhile, implemented a Central Ticketing System covering roll-on/roll-off and passenger ships calling at ports within PPA jurisdiction. PPA AO 01-2020, entitled "Prescribed Waste Reception Fee in All PPA Ports," was also mentioned for increasing the waste reception fee in all PPA ports. PPA AO 04-2021 established a system for the registration and monitoring of containers entering and leaving PPA ports, known as the Trusted Operator Program-Container Registry Monitoring System (TOP-CRMS), as well as an Empty Container Storage Shared Service Facility (ECSSSF). PPA AO 08-2021, which amended PPA AO 01-2020, modified the types and classifications of vessels subject to the waste reception fee, including the imposition of a per-round-trip collection of said fee for "short travel time" vessels.