Second, Congress has provided alternative remedies for aggrieved parties in Boule’s position that independently foreclose a
Bivens action here. By regulation, Border Patrol must investigate
“[a]lleged violations” and accept grievances from “[a]ny persons.” 8
CFR §§287.10(a)–(b). Boule claims that this regulatory grievance procedure was inadequate, but this Court has never held that a Bivens
alternative must afford rights such as judicial review of an adverse
determination. Bivens “is concerned solely with deterring the unconstitutional acts of individual officers.” Correctional Services Corp. v.
Malesko, 534 U. S. 61, 71. And, regardless, the question whether a
given remedy is adequate is a legislative determination. As in Hernández, this Court has no warrant to doubt that the consideration of
Boule’s grievance secured adequate deterrence and afforded Boule an
alternative remedy. See 589 U. S., at ___. Pp. 12–13.