1. Individual Autonomy
2. Non-Discrimination
3. Legal Principle: Best Interests of the Child

The "For" case rests on the fundamental duty of the state to ensure that its administrative systems do not become instruments of abuse. By granting the Registrar discretion to refuse applications intended to harass, the Bill protects the Individual Autonomy of victim-survivors, ensuring they are not forced into unwanted and dangerous engagement with an abusive former partner [Judgment]. The removal of mandatory document exchange is a vital application of Non-Discrimination principles, as the current "open exchange" model disproportionately endangers those at risk of family violence, effectively barring them from seeking fair assessments due to safety concerns. Furthermore, the Bill upholds the Legal Principle of the "best interests of the child" by ensuring that financial support is determined through a process that prioritises the safety of the child's primary caregiver. Strengthening collection mechanisms for retrospective arrears prevents "financial abuse... by engineering retrospective changes" [Explanatory Memo page 51], ensuring that the system serves its intended purpose of child welfare rather than coercive control [Judgment].

1. Legal Principle: Natural Justice
2. Value-Neutral / Epistemic Objection

The "Against" case focuses on potential erosions of procedural fairness and administrative transparency. Under the Legal Principle of natural justice, parties to a dispute generally have a right to see the evidence against them. Replacing the mandatory exchange of documents with Registrar-defined "summaries" or redacted versions may prevent a party from effectively challenging a "change of assessment" application, as they may lack the specific details necessary to rebut claims [Judgment]. There is also a Value-Neutral / Epistemic Objection regarding the expansion of discretionary power. Granting the Registrar the authority to summarily dismiss objections based on a subjective assessment of "prospects of success" or "marginal impact" creates a risk of administrative overreach. If the Registrar incorrectly assesses the potential impact of a variation, a parent may be denied their right to a full internal review, potentially leading to financial hardship that the "marginal impact" threshold failed to capture [Judgment]. This shift toward administrative efficiency may come at the cost of the rigorous accuracy required in financial determinations.