In a grant budget narrative, what is the precise distinction between 'direct costs' and 'indirect costs' that dictates whether an expense can be fully charged to the grant or must be allocated through an approved rate?

In a grant budget narrative, the precise distinction between direct costs and indirect costs that dictates whether an expense can be fully charged to the grant or must be allocated through an approved rate lies in its traceability and the specific, exclusive benefit it provides to the grant's objectives. Direct costs are expenses that can be specifically identified with and directly attributed to a particular grant project with a high degree of accuracy. They are incurred solely for the benefit of, or are directly consumed by, the specific grant activities and their defined scope of work. Because their purpose and benefit are clearly, unambiguously, and exclusively tied to the grant, these costs can be fully charged, meaning 100% of the expense is borne by that specific grant. For example, the salary of a project manager dedicated full-time to the....