Implementing bail-in across multiple jurisdictions raises complex legal issues. These include differing insolvency laws in various countries, which can affect the ranking of creditors and the enforceability of bail-in powers. Additionally, securities regulations and exchange requirements can vary significantly, creating challenges for the write-down or conversion of debt instruments held by investors in different jurisdictions. These legal complexities require further study and harmonization to ensure the effective operationalization of cross-border bail-ins.

A is incorrect. While TLAC ensures that banks have sufficient resources to absorb losses during a resolution, most G-SIBs, including those involved in 2023, were compliant with TLAC requirements. The issue lies more in the operational and legal execution of bail-ins rather than the adequacy of resources.

C is incorrect. G-SIBs are required to have detailed resolution plans, often referred to as "living wills." The challenge is not the absence of plans but the practicality of implementing them in complex cross-border situations.

D is incorrect. While authorities may sometimes prefer alternatives (e.g., mergers or public sector interventions) to maintain market confidence, the reluctance is not the primary challenge. The focus is on overcoming the practical difficulties of executing bail-ins effectively.