172. Authorisation procedure and compensation.

172.     Authorisation procedure and compensation.

Except where disclosure of the production1 or supply of the defence materials2 in question would be prejudicial to the safety of the state3, a competent authority must, before giving an authorisation in respect of any restriction or obligation to any person, serve on him written notice requesting him to treat with the party entitled to enforce the restriction or obligation for the waiver or the modification of such restriction or obligation, and must allow time4 for an agreement5 embodying such waiver or modification to be concluded6; and, where an authorisation is given,