Regulation 19 Authorisation of expenditure

No question as to the propriety of any step, or as to the amount of the payment within the maximum authorised, with regard to which prior authority has been given under regulation 17 or 18 or under any contract, shall be raised on any determination of costs unless the representative knew or should reasonably have known that the purpose for which it was given had become unnecessary.

Payment may be allowed on a determination of costs in respect of any step with regard to which prior authority may be given, notwithstanding that no such authority was given or that the maximum authorised was exceeded.