5. In regulation 40 of the principal Regulations (restriction on payment of allowances), there shall be inserted at the beginning of paragraph (2) the words “Subject to paragraph (3),” and there shall be inserted after paragraph (2) the following paragraph:—
“(3) A constable of the rank of superintendent or above who is required to travel by train in the execution of his duty shall be entitled to travel in first-class accommodation and to be reimbursed his expenses accordingly.”.