Yes, it falls under RTI preview as it is substantially funded by Government.
To get to know about the PIO, a simple application to the Head of the Office would be sufficient. The Head of the organisation is bound to provide the information as to who is PIO.
RTI Application seeking information alongwith prescribed fee can be directed to the Managing Director or Chief Executive, who is bound to transfer it to concerned PIO. Section-6(3) of RTI Act provides that where an application is made to a public authority requesting for an information - (i) which is held by another public authority, or (ii) the subject matter of which is more closely connected with the functions of another public authority, the public authority, to which such application is made, shall transfer the application or such part of it as may be appropriate to that other public authority and inform the applicant immediately about such transfer. . As per proviso under this sub-section, such transfer is required to be made within five days from date of receipt of application.
Therefore the CEO or MD or CMD whosoever may be, is duty bound to transfer the RTI Application to the correct PIO.