The following article re a NSW Supreme Court decision: EB 9 & 10 Pty Ltd v The Owners SP 934 [2018] NSWSC 464, regarding parking access and common property may have some relevance to your issue:
http://turnbullbowles.com.au/keep-out-no-an-owners-corporation-cannot-block-access-to-a-lot/
From reading the Judgement it appears that you do not have to provide access to turn around. Access to a parking position that it only ‘front in’ and ‘rear out’ appears to be permissible.