(1) For the purposes of this Act, an assurance of support that has been given in respect of a person identified in the assurance and has been accepted under this Chapter:
(a) comes into force in respect of the person at the later of the following times:
(i) the time at which the person becomes under the Migration Act 1958 the holder of the visa that was granted under that Act in connection with the assurance;
(ii) the time at which the person enters the migration zone (as defined in that Act) as the holder of the visa; and
(b) remains in force in respect of the person until the earliest of the following times:
(i) the end of the period specified for the purposes of this subparagraph in a determination under section 1061ZZGH;
(ii) the time (if any) determined by the Secretary under subsection (2);
(iii) if a circumstance specified for the purposes of this subparagraph in a determination under section 1061ZZGH applies in relation to the assurance--the time determined by the Secretary in relation to that circumstance.
Note: An assurance of support given in respect of 2 or more persons may be in force at different times in respect of each of those persons.
(2) The Secretary may determine that the assurance of support ceases to be in force in respect of the person at the time (which may be before the determination is made) another assurance of support comes into force in respect of the person.
(3) For the purposes of this Act, an assurance of support (as defined in section 1061ZZGA) is in force in respect of a person only for the period for which it is in force in respect of the person under subsection (1) of this section.
(4) Except as provided by paragraph (1)(b), an assurance of support that has come into force in respect of a person remains in force in respect of that person in spite of any change in circumstances whatsoever (including any purported withdrawal, however described, of the assurance).