If a senior officer grants an authorisation under paragraph 20, the examining officer who applied for the authorisation must inform the Investigatory Powers Commissioner and each affected party of its grant.

The information required under sub-paragraph (1) must be given as soon as reasonably practicable and in any event within 24 hours after the grant of the authorisation.

An affected party may make representations to the Commissioner about how the Commissioner should proceed under paragraph 22 in respect of an authorisation granted under paragraph 20.

Representations under sub-paragraph (3) must be made in writing no later than the end of two working days beginning with the first working day after the day on which the authorisation is granted.

The information provided under sub-paragraph (1) must include an explanation of the right to make representations in writing and the time by which they must be made.

The Commissioner must have regard to any representations made before the end of the time mentioned in sub-paragraph (4) in determining how to proceed under paragraph 22.

The requirement under this paragraph to provide information to the person from whom an article was taken from which the copy was made applies only so far as it is reasonably practicable to do so.

In this paragraph and paragraph 22—

• “affected party” has the meaning given by paragraph 19(3);

• “working day” means a day other than a Saturday, a Sunday, Christmas Day, Good Friday or a day which is a bank holiday under the Banking and Financial Dealings Act 1971 in the part of the United Kingdom in which the authorisation is granted.