Generally speaking the limitation, along with any other specific exclusions such as "no tuition," will be specified somewhere in the RFP. It may also be listed on the sponsor's website, or be a limitation based on a cooperative agreement, such as a CESU. When in doubt check with your Sponsored Project Administrator
for assistance. Note that written evidence of the limitation, such as a published policy, must be provided to OSP as part of the completed proposal package.