Participant Support Costs as defined by 2 CFR §200.1, 200.456, are direct costs for items such as stipends or subsistence allowances, travel allowances, and registration fees paid to or on behalf of participants or trainees (but not employees) in connection with conferences, or training projects (note that participant support costs do not apply to NIH training grants).
Effective March 2022, ...
Read more about New Guidance & Procedure: Participant Support Costs