12.4 The parties acknowledge that the Authority may, from time to time during the Construction Phase, be required to procure the erection of hoarding, site boards, plaques and/or other signage in connection with the Project. Accordingly:
12.4.1 where requested by the Authority (acting reasonably), Sub-hubco shall procure the erection and maintenance of such hoarding, site boards, plaques and/or other signage as the Authority may require; and
12.4.2 the size, design, information disclosed, position and materials used in connection with such hoarding, site boards, plaques or other signage shall be approved by the Authority, such approval not to be unreasonably withheld; [and
12.4.3 for the purposes of this Clause 12.4 (Corporate Identity and Signage), the Authority shall be deemed to be acting reasonably where any proposals made by it and/or any approvals exercised by it conform with any relevant guidance issued to NHS Boards by the Scottish Government Health Directorate (or any successor Department) in relation to such matters whether by Executive Letter or otherwise.]