Commonwealth Consolidated Regulations Commonwealth Consolidated Regulations(1) A person may apply to CASA, an authorised person or a relevant approved design organisation, in writing, for approval of any material, part, process or appliance that is not covered by regulation 21.305.
(2) CASA, or the authorised person or relevant approved design organisation, must grant the approval if satisfied that:
(a) doing so would be unlikely to have an adverse effect on aviation safety; and
(b) the material, part, process or appliance meets the requirements prescribed by the Part 21 Manual of Standards.