Perisai Petroleum Teknologi Bhd announced resignation of Dato' Seri Diraja Tunku Soraya Sultan Abdul Halim Mu'adzam Shah as Independent and Non Executive Director due to D.Y.A.M. Tunku Soraya Binti Almarhum Sultan Abdul Halim Mu'adzam Shah Raja Puan Muda Perak Darul Ridzuan's commitments and responsibilities as the Raja Puan Muda Perak where the state functions need her presence and she is actively involved with several Non Govermental bodies. She also resigned from member of Nomination Committee.