Position Report Waypoints:

Position report for flights on routes not defined by designated reporting points shall be made at thee significant route waypoints authorized by ATC on the Oceanic Clearance or on subsequent amended route clearances and should be transmitted to Santa Maria Radio.

Data Link Position Reports:

Santa Maria OAC accepts ADS-C Waypoint Position Reports. Additionally to Waypoint position reports, Santa Maria also accepts and processes periodic position reports. On IVAC we will assume the flight track as ADS-C track.
CPDLC position reports are not accepted in Santa Maria FIR.