Dragonfly – it depends upon the reason/s for the over expenditure and whether that’s a “one off”, due to a number of matters, or is symptomatic of regular under estimations of expenditure possibly due to Proprietors’ reluctance to match their collective Levy Contributions to a properly calculated budget.
There are two (2) reports that are generally called “Strata Reports”, one (under S108 of the Act) contains details of the Plan’s insurance policy, the amount of the Levy Contributions applicable to the Lot, any amounts outstanding by the current Proprietor, and the current balance of the Admin. and Sinking Funds. The second report (under S109 of the Act) contains all of the above plus details of all expenditure for the past two (2) years, the Plan’s 10 year expense plan, details of any special levies past or planned, minutes of past General Meetings or at least a summary of significant items such as disputes, By-Laws, and any planned building works (that may or may not have been budgeted), and more….
If it’s the S108 Report that you have, then ask for one under S109, and if you have the latter already then you need to read it more carefully or ask the person who provided it for some explanations; there may be a perfectly reasonable one, but right now you don’t know what that is.