But if the vacancy occur in an office of which the lawful annual compensation, by salary or by fees ascertained by the last official returns, is more than $1,000 and less than $3,000, and it is not filled by transfer, applications will be addressed to the Secretary of State, inclosing proper certificates of character, responsibility, and capacity, and the Secretary will notify the applicant who upon investigation appears to be most suitable and competent to attend for examination; and if he shall be found qualified he will be nominated for confirmation, but if not found qualified, or if his nomination be not confirmed by the Senate, the Secretary will proceed in like manner with the other applicants who appear to him to be qualified.  If, however, no applicants under this regulation shall be found suitable and qualified, the vacancy will be filled at discretion.  The appointment of commercial agents and of consuls whose annual compensation is $1,000 or less (if derived from fees, the amount to be ascertained by the last official returns), of vice-consuls, deputy consuls, and of consular agents and other officers who are appointed upon the nomination of the principal officer, and for whom he is responsible upon his official bond, may be, until otherwise ordered, excepted from the operation of the rules.

6.  When a vacancy occurs in the office of collector of the customs, naval officer, appraiser, or surveyor of the customs in the customs districts of New York, Boston and Charlestown, Baltimore, San Francisco, New Orleans, Philadelphia, Vermont (Burlington), Oswego, Niagara, Buffalo Creek, Champlain, Portland and Falmouth, Corpus Christi, Oswegatchie, Mobile, Brazos de Santiago (Brownsville), Texas (Galveston, etc.), Savannah, Charleston, Chicago, or Detroit, the Secretary of the Treasury shall ascertain if any of the subordinates in the customs districts in which such vacancy occurs are suitable persons qualified to discharge efficiently the duties of the office to be filled; and if such persons be found he shall certify to the President the name or names of those subordinates, not exceeding three, who in his judgment are best qualified for the position, from which the President will make the nomination to fill the vacancy; but if no such subordinate be found qualified, or if the nomination be not confirmed, the nomination will be made at the discretion of the President.  Vacancies occurring in such positions in the customs service in the said districts as are included in the subjoined classification will be filled in accordance with the rules.  Appointments to all other positions in the customs service in said districts may be, until otherwise ordered, excepted from the operation of the rules.

7.  When a vacancy occurs in the office of collector, appraiser, surveyor, or other chief officer in any customs district not specified in the preceding regulation, applications in writing from any subordinate or subordinates in the customs service