PI has a conference grant. Funds have been paid to the conference center but now many universities are cancelling due to the institutional travel policies that do not allow non-essential travel. Are any conference center charges allowable? 

Many federal sponsors have released guidance allowing projects to charge cancellation fees from conferences and travel to grant funds. This includes the NIH, NSF and DOD. Projects should take care to maintain documentation of the original charges and fees accrued due to cancellation.