I have since been advised by a staff member at Consumer Affairs that under the OC Amendment Act 2013 S.6 New Section 49 Substituted (1) ” An OC may recover as a debt the cost of repairs, maintenance or other works undertaken wholly or substantially for the benefit of one or some, but not all, of the lots affected by the OC from the lot owner ” Also if the private yard is shown on the subdivision plan as being on their title then this reinforces this regulation even more. Hope this helps.