determines petitioners entitlement to permanent disability benefits is his inability to work for more than 120 days.   However, it is not possible for us to compute petitioners disability benefits. The Labor Arbiter, in computing petitioners disability benefits, relied on the medical certificate issued by Dr. Rigonan who rated petitioner with Impediment Scale of 6. As stated earlier, we cannot accept the medical certificate issued by Dr. Rigonan.Hence, the case should be remanded to the Labor Arbiter to determine petitioners disability grade for the purpose of computing his disability benefits.   WHEREFORE, we GRANT the petition. We SET ASIDE the 13 July 2001 Decision and 21 February 2002 Resolution of the Court of Appeals in CAG.R. SP No. 60356. We REMAND the case to the Labor Arbiter for the determination of petitioner Mars C. Palisocs disability grade under the POEA Impediment Grading Scale.   SO ORDERED.   ANTONIO T. CARPIO Associate Justice   WE CONCUR:   LEONARDO A. QUISUMBING Associate Justice Chairperson