What is the relevance of the term "Expenditure defrayable by the Union or a State out of its revenues" in this context?
The term "Expenditure defrayable by the Union or a State out of its revenues" is relevant in this context as it pertains to the financial autonomy and authority of both the central government (Union) and state governments. It signifies that they have the power to make grants for any public purpose, even if it falls outside their specific legislative powers, from their own revenues. This implies a certain level of fiscal independence and flexibility for both Union and State governments in allocating resources towards public projects or initiatives.