Which mechanism controls the rate at which obligations are incurred?

• A. Authorization
• B. Allocation
• C. Appropriation
• D. Apportionment

Answer: (D)

Apportionment is the mechanism that controls the rate at which obligations are incurred. By dividing a total appropriation into time‑phased allotments, it specifies how much can be obligated in each period (for example, quarterly or monthly). This pacing prevents spending from exhausting funds too early and ensures the appropriation is used steadily throughout the fiscal year. The total appropriation gives the legal authority to incur obligations, but apportionment determines the actual pace. Authorization provides the legal basis to create or continue a program, but it doesn’t schedule spending. Allocation distributes funds to programs or projects but does not set the obligation rate within the period.