1. Until promotion regulations have been applied to a classified customs district, the following promotions may be made therein at any time after absolute appointment:
(a) A clerk, upon any test of fitness determined upon by the nominating officer, to any vacant place in the class next above the one in which he may be serving.
(b) A day inspector, upon any test of fitness determined upon by the nominating officer, to class 2 in the grade of clerk.
(c) A clerk, day inspector, opener and packer, or sampler, after passing the examiner examination, to the grade of examiner.
(d) A messenger, after passing the clerk examination, to the lowest class in the grade of clerk.
(e) A night inspector, after passing the day-inspector examination, to the grade of day inspector.
2. Other promotions may be made, in the discretion of the promoting officer, upon any test of fitness determined upon by him.
CUSTOMS RULE VI.
1. Transfers may be made as follows:
(a) From one office of a classified district to another office in the same district, subject to the provisions of Customs Rule V.