In working out whether the period of 3 years after the date of discoverability, or the long - stop period, has expired, disregard any period during which the plaintiff has been:
(a) a minor who is not in the custody of a capable parent or guardian; or
(b) an incapacitated person in respect of whom there is no guardian, and no other person to manage all or part of the person's estate, under a law of a State or Territory relating to the protection of incapacitated persons.