An interested person desiring the analysis, classification, or grading of any naval stores, or of samples thereof, shall submit to the nearest official inspector a written request, in which he shall state the number and kind of containers of rosin, or the number and kind of containers and the number of gallons of turpentine, as the case may be, together with the name of the interested person for whose account such service is requested, his interest in the naval stores, and other information by which the identity of the naval stores in question and the propriety of its examination may be determined. Requests for seasonal or recurrent services shall so indicate, and the approximate quantity of naval stores to be graded and the duration of the desired service shall be stated. Fees for such service shall be paid in accordance with the provisions in this part.