[...]
(2) Applications by persons specified in paragraphs 4(c) to (f) shall be signed as follows:
(c) when made by trade commissioners of career, by the senior trade commissioner or by the trade commissioner in charge in offices where there is no senior trade commissioner; and
(d) when made by assistant trade commissioners of career, by the trade commissioner in charge of the office or by the assistant trade commissioner in charge in offices where there is no trade commissioner.
4 Subject to sections 5 and 6, the privilege of importation at free rates of customs duties of articles for their personal or family use is extended to
(e) trade commissioners of career; and
(f) assistant trade commissioners of career.
