New DHS policies have gone into effect. They were scheduled to begin in January, but are now being enforced, and will apply to those protesting outside ICE facilities. Those most applicable to protesters are:
§ 139.35 Prohibited conduct.
All persons are prohibited from engaging in the following conduct, on federal property or in areas outside federal property, that affects, threatens, or endangers federal property or persons on the federal property
(a) Disorderly conduct, which includes, but is not limited to, assaulting, fighting, harassing, intimidating, threatening or other violent behavior, lewd acts, or the inappropriate disposal of feces, urine, and other bodily fluids.
(b) Wearing a mask, hood, disguise, or device that conceals the identity of the wearer when attempting to avoid detection or identification while violating any federal, state, or local law, ordinance, or regulation.
(c) Creating a loud or unusual noise, noxious odor, or other nuisance.
§ 139.85 Penalties.
A person who violates any provision of Subpart B of this Part may be punished by a fine under title 18, United States Code, imprisoned for not more than 30 days, or both.
https://www.dhs.gov/publication/federal-rules-and-regulations-conduct-federal-property