28 CFR §549.64

1. (a)Staff shall prepare and deliver to the inmate's room three meals per day or as otherwise authorized by the physician.
2. (b)Staff shall provide the inmate an adequate supply of drinking water. Other beverages shall also be offered.
3. (c)Staff shall remove any commissary food items and private food supplies of the inmate while the inmate is on a hunger strike. An inmate may not make commissary food purchases while under hunger strike management.