A big problem here is finding out exactly what the rules are. This predates the current situation.
They will sometimes post on Facebook but not their official sites, they will post on their official sites but not on Facebook, they may not post at all but just make a news announcement that may or may not actually make it to the news sites.
(They use Facebook a lot here because it is generally free data to connect.)
They will leave up old posts and since they often do not take them, you can be looking at the rules from last March thinking that they are current.
They post what they are hopeful the rules will be, you could go to Cebu Pacific or PAL or Air Asia sites and book flights, on the full schedule, for 2 weeks in advance because the airlines were HOPING that they could fly then.
Different agencies, different government levels and different individuals within one agency will often give out different rules. One information channel will say one thing and another will contradict it.
Then at the interaction between the public and the people enforcing the rules you get people with totally different understandings of the rules trying to determine what the rules are.
Then the rules will change tomorrow, often with immediate effect.
Bottom line is if you are thinking recreational travel here, I would advise that you wait until the situation stabilizes or be prepared to get stuck in a quarantine somewhere along the way and /or to end up paying a lot more for a return flight home ( sweeper flights Manila to Vancouver were going for about twice a round trip ticket previously cost, three times if you wanted to go to Toronto.) I have not heard what a quarantine hotel costs, but I doubt if it is less than it was pre-quarantine days.
I would not get on a dive boat if the same risks and uncertainty applied to the excursion as apply to trying to travel internationally just about anywhere right now.
