Anthоny McCoy is a federal inmate in Lisbon, Ohio, who was formerly held at the Federal Correctional Institution in Green-ville, Ill. (“Greenville”). McCoy claims that he suffered cruel and unusual punishment at the hands of Greenville’s corree-tional officers, who allegedly beat him in late October 1995 in retaliation for his involvement in a prison riot that occurred earlier in the month. The district court found that McCoy had not exhausted the administrative remedies available to him at Greenville. The court granted Defendant Zachary’s motion for summary judgment, granted Defendant Nelson’s motion to dismiss, and then dismissed without prejudice the claims against the remaining defendants sua sponte. We affirm.
I.
Greenville is an overcrowded, medium-security federal prison where more than 1000 men are housed in four units that have a capacity of 750. By October 1995, tensions had been mounting at Greenville for several weeks. 1 The Bureau of Prisons (“BOP”) ordered a lockdown at all federal institutions on October 20, 1995. Green-ville’s inmates are rarely confined in this manner, and many of them became agitated and suspicious of the guards because they refused to explain the reason for the lockdown. Scores of prisoners in two housing units erupted violently. The ensuing riot, which engulfed the unit where McCoy resided, lasted 24 hours and was of such magnitude that it made national news. Numerous employees sustained severe injuries, аnd the prison itself suffered more than $400,000 in property damage.
A group of vigilante correctional officers, including the appellees, amassed a list of prisoners who were believed to have been involved in the disturbance. On the night of October 26, 1995, the officers donned full riot gear and burst into McCoy’s cell. Nelson sneered, ‘You like to hurt officers. *507 You like to kill officers. You tried to set me on fire. You’re not so tough by yourself. I got my gang now.” McCоy told Nelson that he neither joined nor participated in the rioting and, upon review, we have not discovered any evidence that would disprove McCoy’s statement. Nevertheless, according to McCoy, Nelson and the others handcuffed him, slammed his head against the cell door, and dragged him into another room used for strip searches. They cut his shirt off, slapped him across the face, and forced him to stand with his nose against the wаll. While McCoy stood forlornly, the appellees repeatedly beat him in the rib area with riot sticks. After they completed their assaults, they returned McCoy to his cell, where they continued to verbally taunt him. A few minutes later, the appellees threw another inmate into McCoy’s cell and left both men there, bare naked, for the rest of the night.
BOP and the U.S. Department of Justice investigated the prison riot, and Aper, Gilbert, Nelson, and Zachary wеre cited in April 1996 for such odious misconduct as: verbally and physically abusing inmates, neglecting official duties, advising staff to violate prison policy, failing to report abusive behavior, and filing false statements with the FBI. McCoy brought suit pro se on September 11, 1996. With the assistance of appointed counsel, he filed an Amended Complaint on September 3,1999, raising claims under the Fifth Amendment and Eighth Amendment.
The Prison Litigation Reform Act of 1996 provides that “[n]o action shall bе brought with respect to prison conditions” under 42 U.S.C. § 1983 “or any other Federal law, by a prisoner confined in any jail, prison, or other correctional facility until such administrative remedies as are available are exhausted.” 42 U.S.C. § 1997e(a). Greenville, like all federal prisons, has a multi-step administrative grievance system that allows for the hearing and review of prisoner complaints. Federal regulations require. prisoners to try to resolve their complaints through informal discussions with the prison’s staff. If such discussions are unproductive, then the prisoner has twenty days from the complained-of events to file a written Administrative Remedy Request with the warden, who is empowered to investigate the complaint and to grant or deny the prisoner’s request for relief as he deems prudent. If the prisoner is not satisfied with the warden’s response, then he may continue to seek relief by filing written appеals to BOP’s regional director and then to BOP’s general counsel. See 28 C.F.R. §§ 542.10 to .19. Only after completing these steps has a prisoner exhausted his administrative remedies.
McCoy failed to follow Greenville’s procedures. His effort at exhaustion consisted only of complaining to the staff in his housing unit and cooperating with the Justice Department’s subsequent investigation of the prison riot.
2
Although allegations of assault and excessive force are subjеct to exhaustion,
see Johnson v. Litscher,
Officers Zachary and Nelson both moved to dismiss. Nelson attacked the pleading on its face, while Zachary attached an affidavit from a Greenville administrator, who confirmed that McCoy never “filed any requests for administrative remedy during his incarceration with the Federal Bureau оf Prisons.” The pleadings were referred to U.S. Magistrate Judge Philip M. Frazier, who considered the affidavit when ruling on Zachary’s motion. After completing his review, Judge Frazier properly converted Zachary’s motion to dismiss into one for summary judgment, Fed.R.Civ.P. 12(c), and, upon applying the correct standard of review to Zachary’s motion for summary judgment and Nelson’s motion to dismiss, recommended that they be granted. The district court adopted the recommendation and dismissed the entire complaint, finding that all of McCoy’s claims against every defendant were subject to exhaustion. We review the rulings
de novo. Massey v. Helman,
II.
On appeal, McCoy argues that the district court erred in applying the PLRA’s exhaustion requirements. McCoy was injured October 26,1995, and the PLRA was signed into law April 26, 1996. Under Greenville’s grievance resolution policy— which has been in effect since at least 1995 — an inmate forfeits his right to sue unless he submits a formal, written comрlaint within twenty days of the alleged offense or demonstrates “a valid reason for the delay.” 28 C.F.R. § 542.14(b). Although McCoy never did file such a complaint, he notes that the law that existed on the date of his assault did not mandate the exhaustion procedure.
See, e.g., Neville v. True,
A.
‘When a case implicates a federal statute enacted after the events in suit, the court’s first task is to determine whether Congress has expressly prescribed the statute’s proper reach.”
Landgraf v. USI Film Prods.,
*509
Of course, almost every new statute results in some perceptible effect or impact on countless past or pre-existing choices, decisions, and interests of the actors and subjects in the newly-regulated field. For example, the Court has held that the PLRA’s attorney fee limitations,
see
42 U.S.C. § 1997e(d)(3), apply to any post-judgment monitoring performed after the PLRA took effect, even if the underlying case was filed before then.
See Martin v. Radix,
WTiat
Martin
states is that we cannot simply ask whether application of the PLRA would have some imaginable retroactive effect on the choices McCoy made before April 26, 1996. Rather, we must scrutinize “the nature and extent of the change in the law and the degree of connection between the operation of the new rule and a relevant past event,”
Landgraf,
B.
Congress never has stated that the PLRA’s exhaustion requirements should be applied retroactively. As a result, courts have permitted non-exhausted lawsuits to proceed if they were filed before April 26, 1996.
See, e.g., Mitchell v. Shomig,
The text of 42 U.S.C. § 1997e(a) states that “[n]o action shall be brought with respect to prison conditions ... until such administrative remedies as are available are exhausted.” The exhaustion requirement applies whenever there is some administrative process remaining at the prisoner’s disposal.
See Johnson,
McCoy overlooks the crucial fact that, although an inmate must normally submit a formal grievance within twenty days of the complained-of events, there is a hardship exception for inmates who are able to demonstrate a valid reason for not meeting the deadline. The pertinent regulations read as follows:
Where the inmate demonstrates a valid reason for delay, an extension in filing time may be allowed. In general, valid reason for delay means a situation which prevented the inmate from submitting the request within the established time frame. Valid reasons for delay include the following: an extended period intransit during which the inmate was separated from documents needed to prepare the Request or Appeal; an extended period of time during which the inmate was physically incapable of preparing a Request or Appeal; an unusually long period taken for informal resolution attempts; indication by an inmate, verified by staff, that a response *511 to the inmate’s request for copies of dispositions requested under § 542.19 оf this part was delayed.
28 C.F.R. § 542.14(b).
McCoy speculates that Greenville would not have excused his failure to file before November 15, 1995. However, the record is devoid of any evidence to substantiate McCoy’s assertion, and we cannot imagine why the institution would have construed the regulations in this fashion. The regulations plainly grant Greenville the discretion to excuse untimely grievances if serious aggravating factors or forces substantially influence a reasonable prisoner’s ability or incentive to comply. On the one hand, the prisoner’s grievance will be permanently waived, and the exception will not be available in the ordinary case of strategic delay, negligence, ignorance or mistake. But on the other hand, in this case, the amendment to § 1997e(a) was not reasonably foreseeable, and it made a world of difference with respect to McCoy’s incеntive to grieve. Our concern is not with whether Greenville would have accepted or rejected the post-PLRA grievance. Instead, we “merely need to ask whether the institution has an internal administrative grievance procedure by which prisoners can lodge complaints about prison conditions.”
Massey,
We have recognized that a procedural change in the law should rarely be allowed to extinguish substantive rights absent an express declaration from the legislature. This is known as the “mousetrapping principle.”
See Burris v. Parke,
On appeal, McCoy sought to align his case with
Burris.
Burris was convicted and given the death penalty at a time when the law permitted multiple successive habeas petitions. He filed his first petition in December 1991, and he elected to challenge only his conviction. Then in November 1995, he filed a second petition and challenged only his sentence. The AEDPA took effect in April 1996, and it barred second or successive habeas petitions except in limited factual situations that were not present in Burris’s case.
See id.
at 466-67. We held, however, that the application of AEDPA to the second petition would have attached a serious, material, and tangible new legal consequence to the first challenge that did not exist when the challenge occurrеd. Put another way, we refused to apply AED-PA’s new rule because Burris had no way of foreseeing in 1991 or 1995 that he would be unable to challenge his conviction in one petition and his death sentence in another. If he had, we are convinced, then he would have brought the challenges simultaneously, which is what condemned prisoners customarily do.
See id.
at 468-69. In so holding, we expressly distinguished
Felker v. Thomas,
Burris
and
Felker
teach that a procedural rule that governs the filing of cases can normally be applied to cases brought after the rule is enacted. “Application of a new jurisdictional rule usually takes away no substantive right but simply chаnges the tribunal that is to hear the case.”
Landgraf,
McCoy had notice of the new rule, and his reliance interests have not been unduly trammeled. We see no manifest injustice in telling a prisoner on a going-forward basis that he must work through and exhaust the administrative processes available to him, even if such exhaustion was optionаl under prior law. Congress has merely regulated future conduct without adjudicating the past. Indeed, courts in three other circuits have all dismissed non-exhausted complaints that were filed after April 26, 1996, notwithstanding that the underlying causes of action accrued prior to that date.
See White v. McGinnis,
In the event that the complained-of events transpired before the enactment of the PLRA, a prisoner can show exhaustion by demonstrating that he substantially complied with the institution’s grievance policy. The prisoner must have clearly given the institution notice of his particular demands and reasonably triggered an attempt to resolve them.
See Smith,
We are aware of two decisions excusing a prisoner’s failure to exhaust when the initial time period for bringing a formal complaint expired before April 26, 1996.
See Lavista v. Beeler,
The judgment of the district court is Affirmed.
Notes
. A report by the Bureau of Prisons subsequently attributed these anxieties to the prison’s work assignments as well as the decision of the U.S. Congress not to reform the sentencing guidelines for persons convicted of selling crack and powdered cocaine. See Ap-pellees' Supp.App. Tab 1 ("After Action Team Report of April 10, 1996”).
. McCoy’s Amended Complaint alleged as follows:
Plaintiff exhausted his administrative remedies pursuant to 42 U.S.C. § 1997(e)(a). Plaintiff made a complaint to officials at FCI Greenville on or abоut October 30, 1995. That complaint was eventually reported to defendant Rupert and was later referred’ by Warden Seiter to Internal Affairs for investigation. The complaint was then investigated by the Bureau of Prisons and the FBI. As a result of plaintiff's administrative complaint, and the subsequent investigation, defendant Nelson was disciplined, but plaintiff was not granted any relief.
. The appellees offer stray quotations from several legislators to support their arguments concerning mandatory exhaustion. We need never consider legislative history when interpreting an unambiguous statute.
United States v. Hudspeth,
. See 28 C.F.R. § 542.14(b) (federal prisons); 20 III. Admin. Code § 504.810(a) (Illinois prisons).
