Only the strata manager or EC can issue a Notice To Comply. You, however, can first apply for (mandatory) mediation at Fair Trading then if that doesn’t work, apply to NCAT (formerly the CTTT) for orders forcing the other owner not to park on Common Property.
This is not a road your neighbour would want to go down since falure to abide by NCAT orders carries 10 times the financial penalty of failure to abide by Notices To Comply.
Click HERE to find the process explained in detail, with links to the forms you will need to proceed with your action