4. (3) The Minister may give such directions of a general character, not inconsistent with this Act, to the Controller for the proper discharge of his functions under the industrial property enactments and for the implementation of such policies as may be determined. (4) There shall be posted to the Office such officers as may be necessary for the proper discharge of the functions and duties of the office. (5) The officers posted to the Office shall be public officers and shall be under the direct administrative control of the Controller. (6) The Controller may, subject to the approval of the Minister, appoint, on an ad-hoc basis, such assessors and technical experts on such terms and conditions, as he may consider necessary. (7) The Controller may, in the discharge of his duties under the industrial property enactments, issue administrative procedures. Functions of the Controller (1) The Controller shall (a) upon an application under any of the industrial property enactments (i) (ii) (iii) (iv) (b) (c) (2) 5. grant a filing date in respect of such application; examine such application; grant the patent, wherever applicable; and register any mark, industrial design, geographical indication or Layout Designs, as the case may be; either on his own initiative or upon a complaint made, investigate any allegation of an offence under any of the industrial property enactments; and ensure that the policies and procedures of the office comply with any relevant international standards and guidelines concerning industrial property. Where the Controller has concluded an investigation under subsection 1(b), he shall refer the matter to the Director of Public Prosecutions for any appropriate action. Powers of the Controller (1) The Controller shall have such powers as may be necessary to carry out the functions of the Office under, and in order to enforce, any of the industrial property enactments, and in particular to (a) require any person whose affairs are being investigated to answer any question or otherwise furnish any information or produce such document as may be relevant to the investigation; (b) require any public officer to furnish information or produce any document in his custody;