You are only required to log time required for 61.51.a.1 or .a.2, but are not required to log “all [your] flying hours” by the FAA. (Your airline might require

You are only required to log time required for 61.51.a.1 or .a.2, but are not required to log “all [your] flying hours” by the FAA. (Your airline might require it and it’s a good idea to log all your flights, but it’s not a law.)