Failure to comply with section 18 notice act-s21 โ€” as in force on 2026-06-04 โ€” C2026C00232 ยท Compilation No. 171 โ€” https://www.legislation.gov.au/C2026C00232/latest/text 21 Failure to comply with section 18 notice (1) A person must not refuse or fail to comply with a notice under subsection 18(1). (1A) Subsection (1) does not apply: (a) to the extent that the person is not capable of complying with the notice; or (b) if the person has a reasonable excuse. Note: A defendant bears an evidential burden in relation to the matters in subsection (1A) (see subsection 13.3(3) of the Criminal Code). (2) The following are 2 of the reasonable excuses for refusing or failing to comply with a notice: (a) the person whom the Minister had reason to believe was an unlawful non-citizen was not an unlawful non-citizen at the time the notice was given; (b) the information or documents which the Minister had reason to believe were relevant to ascertaining the identity or whereabouts of a person were not relevant to ascertaining the identity or whereabouts of the person. (3) An offence against subsection (1) is an offence of strict liability. Note: For strict liability, see section 6.1 of the Criminal Code. Penalty: Imprisonment for 6 months.