Chief Minister Oommen Chandy and Home Minister Ramesh Chennithala have signed the file in this regard, sources at the Home Minister's office said here.
Vigilance officials had seized cash and documents during raids at the residences and office of Sooraj at Kochi and Thiruvananthapuram on November 19 in connection with a case of allegedly amassing wealth disproportionate to known sources of income.
Sooraj, who started his career as an officer at the state Forest Department was made IAS in 1999. An FIR has been registered against him at the Thrissur Vigilance Court.