PER CURIAM Opinion; Concurrence by Judge TASHIMA

Petitioner Anthony Lewis Whalem/Hunt is serving a life sentence with possibility of parole based on his conviction in California state court for carjacking, kidnapping for ransom, and kidnapping for carjacking. Petitioner timely appealed his conviction, and the California Supreme Court denied *1147 his petition for direct review on April 24, 1996. The time for filing a petition for certiorari in the United States Supreme Court expired on July 23, 1996. Petitioner filed a pro se petition for habeas corpus in the California Court of Appeal on December 6, 1997. That petition was denied on December 30,1997. Petitioner then filed a pro se petition for habeas corpus in the California Supreme Court on January 14, 1998. That petition was denied on May 27, 1998.

Petitioner filed a pro se petition for ha-beas corpus in federal district court on October 28, 1998. Prior to the adoption of the Antiterrorism and Effective Death Penalty Act of 1996 (“AEDPA”), Pub.L. No. 104-132, 110 Stat. 124, there was no statute of limitations applicable to petitions for habeas corpus in federal court. The new limitations period created by AEDPA is as follows:

28 U.S.C. § 2244 (d)(1). There was nothing on the habeas corpus form supplied to petitioner that mentioned AEDPA or any limitations period.

Respondent moved in the district court to dismiss the petition on the ground that petitioner failed to comply with the one-year limitations period of AEDPA. Unless there was an “impediment to filing an application” or unless the limitation period was tolled, the time dhring which petitioner could file his federal petition expired one year after petitioner’s judgment of conviction became final. The judgment became final on July 23, 1996, when the time to seek certiorari from the Supreme Court on direct review expired.

In a declaration appended to petitioner’s opposition to the motion to dismiss, petitioner stated that the law library of the prison in which, he is incarcerated did not have legal materials describing AEDPA until June 1998. He further stated that he “had no knowledge of any limitations period” prior to December 1998. Respondent was not given — and, given the district court’s holding, did not need — an opportunity to present evidence contradicting petitioner’s statements.

The magistrate judge to whom the case was assigned wrote:

The district court adopted the report and recommendation of the magistrate judge and dismissed the petition as time-barred. Petitioner timely appealed, and a panel of this court affirmed. See Whalem/Hunt v. Early, 204 F.3d 907 (9th. Cir.2000). We then ordered that the case be reheard en banc and directed that the panel opinion not be cited as precedent. See Whalem/Hunt v. Early, 218 F.3d 1078 (9th Cir.2000).

Petitioner argues that his petition is not time-barred under either of two theories. First, he argues that the unavailability of AEDPA in the prison law library before June 1998 was an “impediment” to his filing an application. See 28 U.S.C. § 2244 (d)(1)(B). Second, he argues that the unavailability of AEDPA provides grounds for “equitable tolling” of its one-year limitation period. See Miles v. Prunty, 187 F.3d 1104, 1107 (9th Cir.1999); Calderon v. United States District Court (Kelly), 163 F.3d 530 , 541-42 (9th Cir. 1998); Calderon v. United States District Court (Beeler), 128 F.3d 1283, 1288-89 (9th Cir.1997).

We do not agree with the district court that there are no circumstances consistent with petitioner’s petition and declaration under which he would be entitled to a finding of an “impediment” under § 2244(d)(1)(B) or to equitable tolling. We therefore reverse the district court’s dismissal of the petition. On the present record, however, we cannot go farther. The district court gave petitioner no opportunity to amend his petition or expand his declaration; respondent was not asked to respond to petitioner’s declaration; and the district court held no evidentiary hearing. Because determinations of whether there was an “impediment” under § 2244(d)(1)(B) and whether there are grounds for equitable tolling are highly fact-dependent, and because the district court is in a better position to develop the facts and assess their legal significance in the first instance, we believe the best course is to remand to the district court for appropriate development of the record.

REVERSED and REMANDED.