SECTION 1. Section twelve hundred and eighty of Act Numbered Twenty-seven hundred and eleven, known as the Administrative Code, is hereby amended to read as follows:
"SEC. 1280. Duties of appraisers.—Under the orders of collectors of customs, appraisers shall appraise the merchandise in the unit of quantity in which the merchandise is usually bought and sold, and supervise the appraisal and classification of all merchandise, goods, wares, and effects, of whatever description, whether dutiable or free, which may be presented to them in proper form or for the appraisal or classification of which the proper order may have been received.
"Appraisers shall be responsible to the collectors of customs for the correct appraisal of all such goods; that the amounts, classes, and values returned by them are in all respects accurate and correct, and that the paragraphs, subparagraphs, rules, and dispositions of the tariff, and of this title, and the rules and instructions of the Insular Collector in respect thereto have been correctly applied and followed."