Members of the Legislative Council can introduce bills that don't relate to which of the following?

Members of the Legislative Council in Hong Kong have the authority to introduce bills, but there are certain restrictions on what those bills can pertain to. The correct choice illustrates that public expenditure is outside the scope of what individual members can propose.

Public expenditure typically refers to government spending, including budgets and financial allocations, which is primarily governed by the Executive branch of the Government. Budget proposals and fiscal matters are matters of policy that require comprehensive financial planning and often involve negotiations within the government structure itself. This ensures that financial resources are allocated in a coherent manner that aligns with the overall policies and priorities set forth by the administration.

On the other hand, local laws can be introduced by members of the Legislative Council as they pertain directly to local governance. International treaties often involve legislative approval but may not be initiated at this level since they are usually negotiated between the executive and foreign governments. Government structure is also a subject matter which can involve legislative action, since amendments to the structure may concern council procedures or electoral processes.

Thus, recognizing that public expenditure is primarily a function of the executive and represents a sensitive area of governance, it becomes evident why members of the Legislative Council cannot introduce bills on this topic.