As a general rule, OSP requires preparation of a detailed budget to ensure that sufficient funds are requested, and to affirm that PI effort is explicitly devoted to the project, even though this information may not be included in the proposal.
When multiple activities or tasks are proposed, such as administrative costs or program costs, a separate OSP budget template corresponding to each function, activity or task is recommended. The total costs for each activity correspond to the amount to be proposed in a functional or activity-based budget. Many sponsors, e.g. Department of State, also require the line-item details comprising the functional budget.