22. (1) For the purposes of subsection 21 (3), a person who carries on a public health risk activity is exempt if—
(a) the person is currently accredited in accordance with the requirements of an activity accreditation scheme determined under paragraph (2) (a) in relation to that activity;
(b) the person has not, within the previous 12 months, contravened an activity accreditation standard in association with that scheme, being a standard determined under paragraph (2) (b), except in accordance with an approval under paragraph 27 (1) (a); and
(c) the person has not, within the previous 12 months, contravened this Act.
(2) The Minister may, by instrument, determine—
(a) an activity accreditation scheme; and
(b) activity accreditation standards in association with such a scheme.
(3) A determination under subsection (2) may apply, adopt or incorporate any matter contained in an instrument or other writing as in force or existing from time to time.
(4) A determination under subsection (2) is a disallowable instrument for the purposes of section 10 of the Subordinate Laws Act 1989 .