The rule might be considered OTT but it's there.
Originally Posted by CAO 82.5
5.3 Unless otherwise approved in writing by CASA and subject to paragraph 5.4, an operator must not permit turbo-jet aeroplanes to use runways that are not equipped with electronic or visual approach slope guidance.
5.4 Paragraph 5.3 does not apply to runways at nominated alternate aerodromes.