Regulation 26

An inspector may at any time not already provided for in these regulations by notice served on the person having responsibility for a tip which is not a classified tip for the purpose of ensuring the security of the tip direct that the tip shall be treated for the purposes of all or any of these regulations as a classified tip and any such notice shall, if it is so specified therein, become operative forthwith.

The provisions of Part XV of the 1954 Act with respect to references upon notices served by inspectors shall apply to a notice served by an inspector under the last preceding paragraph, and the relevant ground of objection shall be that compliance with the notice is wholly, or to a particular extent, unnecessary for the purpose of ensuring the security of the tip.