Is it possible to use an EVENT TRIGGER to validate a TRIGGER?

Hi,

Is it possible to use an EVENT TRIGGER to validate a TRIGGER definition?

What I want is to guarantee that the trigger is fired AFTER a STATEMENT, on
INSERT or UPDATE but not on DELETE, like the following example:

CREATE TRIGGER mytrigger
AFTER INSERT OR UPDATE ON mytable
FOR EACH STATEMENT
EXECUTE PROCEDURE myprocedure();

I know I can check those parameters inside the trigger function with TG_OP,
TG_WHEN and TG_LEVEL, but in this way, it only checks if the trigger is
correct during an insertion, upload or deletion, and not right after the
trigger definition.

Best regards,

Luis Lizardo