Section 28. The registrar shall collect fees, as determined annually by the commissioner of administration under the provision of section three B of chapter seven, for the following: (1) For filing an application for a first certificate of title, a certificate of title after a transfer, or a salvage title; (2) For each assignment of a security interest, or an addition of a lienholder; (3) For a duplicate, amended or corrected certificate of title; (4) For a certificate of search of its record for each name or identifying number searched against; and (5) For affixing a new identifying number to a vehicle. Vehicles owned by the commonwealth or any political subdivision thereof, used solely for official business, shall be exempt from the payment of fees provided by this chapter.