At sub-clause 52.1, all the costs not included in Defined Cost are treated as included in the Fee, as Mike has described.
Under main option B, (NEC3), Defined Cost is defined as the cost of the components in the Shorter Schedule of Cost Components (SSCC), so would only apply to compensation events (CEs).
Essentially the Fee would include all costs which are not included in an assessment using the SSCC, as well as profit. Certain elements of the cost components are not included under the SSCC and so would need to be allowed for in the Fee, including; People Providing the Works but who’s normal place of working is outside the Working Areas, preparing quotations for CEs, advertising and recruitment fees, general related overheads (HR, central IT, Accounts & Finance, etc), costs not incurred in order to Provide the Works (company events, general training etc).
The test would be whether the stated people align with the definition of Defined Cost, and can therefore be included as a component cost in the SSCC, and what their specific requirement is as a direct consequence of a CE, that is the difference with a person’s required ‘commitment’ to the project.