Is a donor restriction legally enforceable?

If a church or nonprofit receives a restricted gift, is it legally binding? Who can enforce it? Are there any remedies:

- Article from Jean Tom & LaVerne Woods: https://www.dwt.com/insights/2020/04/using-charitible-funds-during-covid-19
- North Dakota UPMIFA: https://www.legis.nd.gov/cencode/t59c21.pdf
- South Dakota UPMIFA: https://sdlegislature.gov/Statutes/Codified_Laws/2072975