Who is the proper defendant in a civil enforcement action under section 509(a)(2) of the Act [25 U.S.C. 458aaa-8(a)(2)]?

Only the designated Tribal certifying officer acting in his or her official capacity may be sued. Self-Governance Tribes and other Tribal officials are not proper defendants in lawsuits brought under section 509(a)(2) of the Act [25 U.S.C. 458aaa-8(a)(2)].