If you’re applying for federal funds for an existing program, make sure you clearly explain how the grant will be used to expand what you’re already doing. Reviewers need to understand you’re not going to use federal funds to replace your existing funding streams. That would be running afoul of the “supplement, not supplant” rule. And, if you’re not familiar with “supplement, not supplant,” it simply means if you’re already paying for a program with state or private funding, you can’t use federal funds to replace those sources so they can be used for something else. Unless specifically authorized by statute, federal grants are supposed to be used to start or expand programs, not to replace other funds.