The regulations rest on a small set of technical concepts, all tied back to the Act.
Relevant interest, licence/right of occupancy: Reg 4 addresses how a licence or right of occupancy over land given by a relative can be treated as a "relevant interest" under s 5(4) of the Act. That recognition is conditional. The holder must either have entered a comprehensive home building contract, or have commenced building a home or have a home built on the land without entering such a contract (reg 4(1)(a)). The Commissioner must consider the person to have reasonable security of tenure (reg 4(1)(b)). The concept of "reasonable security of tenure" is left to the Commissioner's opinion; the regulation establishes the administrative standard, not an exhaustive test.
Market value when building without contract: Reg 4(2) creates a valuation approach for a particular factual scenario. If a licence or right of occupancy given by a relative is recognised as a relevant interest because building has commenced without a comprehensive contract, then for the purposes of s 18BB(3)(b)(ii) of the Act the market value of the home is taken to be the actual costs to build the home, as determined by the Commissioner. In other words, where construction proceeds outside of a comprehensive contract, the Commissioner will treat the documented actual building costs as market value for that statutory purpose.
Definition of relative: Reg 4(3) supplies a broad family definition for the purposes of the regulation. It includes lineal descendants and ancestors, siblings, and the spouse or domestic partner of the person or those family members (reg 4(3)(a)-(e)). The inclusion of a spouse or domestic partner in multiple limbs makes the definition wide enough to cover common familial patterns that might otherwise be contested.
Interest on instalments: Reg 6 sets the formula for interest on repayments required under s 40 of the Act. The prescribed rate is the market rate plus 8% per annum (reg 6(2)). The market rate is, by default, the average of the daily 90‑day Bank Accepted Bill Rate (the BBSW) for May preceding the financial year, subject to a rounding rule (reg 6(3)(a)), but it may be supplanted by a Ministerial order published in the Gazette specifying another rate (reg 6(3)(b)). Reg 6(1) ties the rate to arrangements entered into by the Commissioner under s 40(5) of the Act.
Disclosure of protected information: Reg 7 identifies precise statutory recipients and purposes that authorise disclosure of "protected information" under s 41(3)(d) of the Act. Recipients include Commonwealth and State agencies engaged in emergency services funding, administration of First Home Saver Accounts, the South Australian Housing Trust, child support administration, social security administration, foreign investment decision-making (including the Commonwealth Treasurer, FIRB members and treasury officials), the Official Receiver in Bankruptcy, legal profession regulators, and councils for assistance with HomeBuilder grant determinations (reg 7(a)-(h), (ga)). Schedule 1 supplements that list with a wide range of offices and bodies that may receive information (Schedule 1).
Inter-agency interaction and Ministerial discretion: Two concepts recur. First, the Commissioner has discretionary administrative judgments: assessing reasonable security of tenure and determining actual costs where construction occurs without a contract (reg 4(1)(b), reg 4(2)). Second, the Minister has a discrete power to specify the market rate for interest by order in the Gazette (reg 6(3)(b)). Both create points where administrative or executive decision-making changes the statutory outcome.
Temporal and publication mechanics: Reg 6(3)(a) uses a fixed anchor for market rate calculation, namely May preceding the financial year, implying a lag between market movements and the rate used. Reg 6(3)(b) requires publication in the Gazette for any Ministerial override, providing a public mechanism to change the calculation method or the rate.
Legislative linkage: The regulations repeatedly reference specific provisions of the Act (for example, reg 4 is expressly for the purposes of s 5(4) and s 18BB(3)(b)(ii), reg 6 for s 40, and reg 7 for s 41(3)(d)), and cross-reference other State and Commonwealth legislation for disclosure purposes. Schedule 1 lists offices whose roles and statutory powers are external to the regulations but which the regulations contemplate as lawful recipients of protected information.