The grant can be used for student salary, student housing, and FICA charges.
We wish to pay the "going rate" for your institute.
Whether you use an hourly rate or base pay we recommend that
it is equivalent to the average rate for YOUR institute. Similarly the
housing allowance should be based on the local rate. Please state in
your budget justification what data were used to determine the wage and
accomodation rates.
Because budgeted funds are allocated under the NSF Participant Support Costs category,
indirects charges can not included, per the NSF Grant Proposal Guide (NSF 13-001) which states
"Generally, indirect costs (F&A) are not allowed on participant support costs."
See
NSF reference.