28 CFR 549.61 - Definition.
As defined in this rule, an inmate is on a hunger strike:
(a) When he or she communicates that fact to staff and is observed by staff to be refraining from eating for a period of time, ordinarily in excess of 72 hours; or
Title 28 published on 2014-07-01.
No entries appear in the Federal Register after this date, for 28 CFR Part 549.