Berita Harian online said Taib had handed in his resignation letter to Sarawak assembly speaker Datuk Mohd Asfia Awang Nass.
Taib's resignation comes ahead of his appointment as Sarawak governor (TYT).
He is expected to have an audience with Yang di-Pertuan Agong Tuanku Abdul Halim Shah on Friday afternoon to receive his credentials as the seventh TYT.
The new Yang di-Pertua Negeri will be sworn-in at the Sarawak State Assembly, Petra Jaya, on Saturday.
Bernama reported yesterday that state Minister in the Chief Minister's Office Tan Sri Adenan Satem will be sworn in as the new Sarawak chief minister on Friday before outgoing Yang di-Pertua Negeri Tun Abang Muhammad Salahuddin at Astana Negeri at 9am.
It will be Tun Abang Salahuddin's final official ceremony before Taib takes over as Sarawak's head of state.
Yesterday, Padungan assemblyman Wong King Wei filed a writ of summons in the Kuching High Court to restrain Taib from accepting the appointment of Yang di-Pertua Negeri of Sarawak, the Malaysiakini newsportal reported.
Wong, who is also Sarawak DAP Youth chief, said the writ stated Taib would be violating Article 2(2) of the state constitution should Taib accept the post of head of state.
"Alternatively, in the event Taib accepts the appointment, a declaration is being sought that he be removed from the office," Wong said.
Wong said Taib should be restrained from becoming TYT because the state constitution stated an appointee was prohibited from being actively engaged in business and commercial enterprise.
He also sought a declaration that Taib has also violated Article 6(5) during his tenure as chief minister by actively engaging in commercial enterprises at all material times.
Taib has been a director in Mesti Bersatu Sdn Bhd since May 9, 2007.
"Taib is also a shareholder of Mesti Bersatu, holding 400,000 shares in the company," Wong said. – February 26, 2014.
~ The Malaysian Insider