Useful info to use when writing your grant:
This website is intended to provide public service. There is absolutely no guarantee that a particular form will be accepted by an agency. Some of the agencies are more particular about the forms. Therefore it is your own responsibility to make sure that a form will be accepted by the agency.
Per Diem Rates
Per Diem Rate -- An allowance (also referred to as subsistence allowance) for lodging (excluding taxes), meals, and related incidental expenses. The CONUS (defined as the 48 contiguous States and the District of Columbia) per diem rates are established annually by GSA for travelers on official Government business to use for their lodging, meals and incidental expenses.
Grant policies and regulations for NSF, NIH, Department of Education, and NASA among others. Also has links to OMB circulars.