The Authority has held that arbitrators are required to apply statutory burdens of proof when resolving an alleged ULP. E.g., U.S. GSA, Ne. & Caribbean Region, N.Y., N.Y., 60 FLRA 864, 866 (2005). By contrast, where an arbitrator resolves a claim under a collective bargaining agreement (CBA) rather than a statutory claim, “unless a specific burden of proof is required, an arbitrator may establish and apply whatever burden the arbitrator considers appropriate . . . .” Id. In this connection, the Authority distinguishes allegations that an agency lacked just cause for discipline under a CBA from allegations of unlawful interference with protected rights under the Statute. See U.S. Dep’t of Veterans Affairs, VA Md. Healthcare Sys., 65 FLRA 619, 621 (2011) (where parties stipulated a just-cause issue, Authority declined to consider claim of alleged violation of § 7102(a) of Statute that was not raised before arbitrator); AFGE, Local 2923, 65 FLRA 561, 563 (2011) (finding that there was no need to address union’s claim that arbitrator improperly analyzed whether grievant exceeded bounds of protected activity when issue before arbitrator was whether there was “‘just and sufficient cause’ for the suspension” rather than whether suspension violated the Statute). In addition, when an arbitrator is not required to apply a statutory standard, alleged misapplications of that standard do not provide a basis for finding the arbitrator’s award deficient. See Soc. Sec. Admin., 65 FLRA 286, 288 (SSA) (2010).